Finance Calculators
Mortgage Calculator
Calculate mortgage payment, loan amount after down payment, total paid, and total interest.
Open calculatorSalar Cafe calculator library
All Online Calculators
Browse organized finance, tax, health, math, construction, science, date, conversion, lifestyle, and developer calculators. Statistical methods remain in their dedicated analysis hub.
196non-statistical calculators
10organized categories
406total plugin calculators
Separatestatistical analysis hub
Common starting points
Popular calculators
Finance Calculators
Loan Calculator
Calculate loan payment, total payment, and total interest.
Open calculatorFinance Calculators
Compound Interest Calculator
Calculate compound future value and earned interest.
Open calculatorHealth Calculators
BMI Calculator
Calculate body mass index from height and weight.
Open calculatorDate and Time Calculators
Age Calculator
Calculate age in years, months, and days between two dates.
Open calculatorGeneral Math Calculators
Scientific Calculator
Evaluate a mathematical expression with parentheses, powers, constants, logarithms, roots, and trigonometric functions.
Open calculatorScience and Engineering Calculators
Ohms Law Calculator
Calculate voltage, current, resistance, and power when voltage and current are entered.
Open calculatorComplete non-statistical directory
Browse calculators by purpose
Use the category navigation or search by calculator name, formula, input, or problem type.
196 calculators shown
1
Money and Planning
Finance, borrowing, investing, property, tax, retirement, and household planning calculators.
Finance Calculators
Loans, mortgages, investing, savings, returns, property, cash flow, and financial planning.
Finance Calculators
Amortization Calculator
Build a loan amortization schedule and measure the effect of optional extra monthly payments.
Open calculatorFinance Calculators
Annuity Calculator
Calculate future value of a regular payment annuity.
Open calculatorFinance Calculators
Annuity Payout Calculator
Calculate a level end-of-period annuity payout, total distributions, and interest from principal, rate, term, and payment frequency.
Open calculatorFinance Calculators
APR Calculator
Solve the monthly rate, nominal APR, and effective annual rate from net loan proceeds, finance charges, equal payments, and term.
Open calculatorFinance Calculators
Auto Lease Calculator
Calculate automotive lease depreciation, money-factor finance charge, tax, monthly payment, residual, and total outlay.
Open calculatorFinance Calculators
Auto Loan Calculator
Calculate taxable vehicle price, sales tax, amount financed, monthly payment, total interest, and combined cash outlay.
Open calculatorFinance Calculators
Average Return Calculator
Calculate arithmetic mean, geometric mean, cumulative return, ending value, and sample volatility from period returns.
Open calculatorFinance Calculators
Boat Loan Calculator
Calculate boat financing with percentage down payment, trade, taxes/fees, and an optional end balloon.
Open calculatorFinance Calculators
Bond Calculator
Calculate coupon payment, current yield, nominal/effective yield to maturity, discount or premium, and duration for a fixed-rate bond.
Open calculatorFinance Calculators
Budget Calculator
Classify monthly expenses as needs, wants, savings, or debt and calculate allocation ratios, surplus, and savings-target gap.
Open calculatorFinance Calculators
Business Loan Calculator
Calculate business-loan payment, net proceeds after fees, contract interest, all-in cost, annual debt service, and fee-adjusted APR.
Open calculatorFinance Calculators
Canadian Mortgage Calculator
Convert a Canadian nominal semiannual mortgage rate to payment-period rate and calculate payment, term balance, principal, and interest.
Open calculatorFinance Calculators
Cash Back or Low Interest Calculator
Compare a cash-rebate loan at standard APR with a no-rebate promotional low-rate loan using the same price, down payment, and term.
Open calculatorFinance Calculators
CD Calculator
Calculate certificate-of-deposit maturity, gross interest, effective yield, estimated interest tax, and after-tax maturity.
Open calculatorFinance Calculators
College Cost Calculator
Project inflation-adjusted college costs, future savings, and the remaining funding gap.
Open calculatorFinance Calculators
Commission Calculator
Calculate commission amount and total pay.
Open calculatorFinance Calculators
Compound Interest Calculator
Calculate compound future value and earned interest.
Open calculatorFinance Calculators
Credit Card Calculator
Project a revolving credit-card balance under a percentage/floor minimum-payment rule and optional recurring purchases.
Open calculatorFinance Calculators
Credit Card Payoff Calculator
Solve either the fixed payment required for a target payoff term or payoff months from a chosen payment, then simulate exact interest.
Open calculatorFinance Calculators
Currency Calculator
Convert an amount with an explicit exchange rate and optional conversion fee, without using a hidden or stale rate.
Open calculatorFinance Calculators
Debt Consolidation Calculator
Compare fixed-payment payoff of multiple current debts with a fee-inclusive consolidation loan's payment, term, and total cost.
Open calculatorFinance Calculators
Debt Payoff Calculator
Simulate debt avalanche or snowball while rolling a fixed total monthly budget to remaining balances and reporting payoff order and interest.
Open calculatorFinance Calculators
Debt Ratio Calculator
Calculate housing-only front-end and total back-end debt-to-income ratios against editable lender limits.
Open calculatorFinance Calculators
Depreciation Calculator
Create annual depreciation schedules using straight-line, declining-balance, or sum-of-years-digits methods.
Open calculatorFinance Calculators
Discount Calculator
Calculate sale price and savings from original price and discount percent.
Open calculatorFinance Calculators
Down Payment Calculator
Allocate available cash among closing costs, emergency reserve, and down payment and compare with an entered minimum.
Open calculatorFinance Calculators
FHA Loan Calculator
Calculate an FHA-style base loan, financed upfront MIP, monthly principal/interest, annual MIP estimate, taxes, insurance, HOA, and total housing payment.
Open calculatorFinance Calculators
Finance Calculator
Solve future value, present value, periodic contribution, or annual rate for a level end-of-period time-value-of-money stream.
Open calculatorFinance Calculators
Fuel Cost Calculator
Calculate trip fuel needed and cost.
Open calculatorFinance Calculators
Future Value Calculator
Calculate future value from present value, rate, and years.
Open calculatorFinance Calculators
Gas Mileage Calculator
Calculate fuel economy from distance and fuel used.
Open calculatorFinance Calculators
HELOC Calculator
Calculate HELOC available credit, interest-only draw payment, later amortizing repayment payment, payment shock, interest, and annual fees.
Open calculatorFinance Calculators
Home Equity Loan Calculator
Calculate available home-equity borrowing from maximum combined LTV, test a requested loan, and calculate its fixed payment and interest.
Open calculatorFinance Calculators
How Much House Can I Afford Calculator
Estimate an affordable home price from income, debts, down payment, housing costs, and lending ratios.
Open calculatorFinance Calculators
Inflation Calculator
Adjust an amount between two price-index levels and calculate cumulative inflation, annualized inflation, and purchasing-power loss.
Open calculatorFinance Calculators
Interest Calculator
Calculate simple, periodically compounded, or continuously compounded growth and effective annual rate.
Open calculatorFinance Calculators
Interest Rate Calculator
Infer periodic, nominal annual, effective annual, and continuously compounded rates from present value, future value, term, and frequency.
Open calculatorFinance Calculators
Investment Calculator
Project an investment from an initial amount and monthly contributions with beginning- or end-of-month timing.
Open calculatorFinance Calculators
IRR Calculator
Solve periodic internal rate of return from a cash-flow series and report NPV at both IRR and a comparison discount rate.
Open calculatorFinance Calculators
Lease Calculator
Calculate a general finance-lease rental from asset value, residual, interest rate, term, and advance or arrears timing.
Open calculatorFinance Calculators
Loan Calculator
Calculate loan payment, total payment, and total interest.
Open calculatorFinance Calculators
Margin Calculator
Calculate gross profit, margin, and markup from cost and revenue.
Open calculatorFinance Calculators
Mortgage Amortization Calculator
Build yearly mortgage amortization and combine principal/interest with property tax, insurance, and HOA for total monthly housing payment.
Open calculatorFinance Calculators
Mortgage Calculator
Calculate mortgage payment, loan amount after down payment, total paid, and total interest.
Open calculatorFinance Calculators
Mortgage Payoff Calculator
Compare baseline mortgage payoff with monthly extra payments and a one-time lump sum, reporting months and interest saved.
Open calculatorFinance Calculators
Mutual Fund Calculator
Project mutual-fund value after sales loads and expense ratio and compare it with a no-fee scenario.
Open calculatorFinance Calculators
Payback Period Calculator
Calculate fractional-year simple and discounted payback from an initial investment and annual cash-flow sequence.
Open calculatorFinance Calculators
Payment Calculator
Calculate periodic installment payment at any annual frequency with an optional discounted balloon and monthly budget equivalent.
Open calculatorFinance Calculators
Personal Loan Calculator
Calculate personal-loan net proceeds after origination fee, scheduled payment, extra-payment payoff, interest, and all-in cost.
Open calculatorFinance Calculators
Present Value Calculator
Calculate present value from future value, rate, and years.
Open calculatorFinance Calculators
Refinance Calculator
Compare current and refinanced mortgage payments, rolled or upfront costs, break-even months, and nominal lifetime payments.
Open calculatorFinance Calculators
Rent Calculator
Project annual rent escalation, final-year rent, cumulative rent, renters insurance, and refundable security-deposit cash outflow.
Open calculatorFinance Calculators
Rent vs Buy Calculator
Compare cumulative rent with homeownership cash flows and net sale proceeds over a fixed whole-year horizon.
Open calculatorFinance Calculators
Rental Property Calculator
Calculate effective rent, NOI, cap rate, mortgage debt service, annual cash flow, cash-on-cash return, DSCR, and break-even occupancy.
Open calculatorFinance Calculators
Repayment Calculator
Simulate payoff from current principal, APR, scheduled monthly payment, and extra payment with an amortization schedule.
Open calculatorFinance Calculators
Return on Investment ROI Calculator
Calculate ROI from beginning value, ending value, and costs.
Open calculatorFinance Calculators
Sales Tax Calculator
Calculate tax amount and total price from subtotal and tax rate.
Open calculatorFinance Calculators
Savings Calculator
Project savings from a starting balance and monthly deposits, separating contributions from interest and comparing with a goal.
Open calculatorFinance Calculators
Simple Interest Calculator
Calculate simple interest and final value.
Open calculatorFinance Calculators
Student Loan Calculator
Calculate interest accrued or subsidized during grace, repayment-start balance, scheduled payment, and extra-payment payoff.
Open calculatorFinance Calculators
Tip Calculator
Calculate tip amount, total bill, and per-person split.
Open calculatorFinance Calculators
VA Mortgage Calculator
Calculate a VA-style base loan, entered funding fee paid or financed, principal/interest, taxes, insurance, HOA, and zero monthly mortgage insurance.
Open calculatorTax and Planning Calculators
Tax estimates, payroll, withholding, retirement, education, and planning scenarios.
Tax and Planning Calculators
401(k) Calculator
Project 401(k) balance from salary-based employee contributions, capped employer match, salary growth, investment return, inflation, and an optional current annual limit.
Open calculatorTax and Planning Calculators
Estate Tax Calculator
Estimate estate tax from gross estate, deductions, prior taxable gifts, entered exemption, marginal rate, and state estate tax.
Open calculatorTax and Planning Calculators
Income Tax Calculator
Calculate progressive ordinary-income tax plus an entered preferential-rate income tax, credits, liability, amount owed, or refund.
Open calculatorTax and Planning Calculators
IRA Calculator
Project Traditional or Roth IRA growth and simplified current-tax savings versus retirement-tax treatment.
Open calculatorTax and Planning Calculators
Marriage Tax Calculator
Compare two individual progressive-tax calculations with one married-joint calculation using explicitly entered deductions and bracket schedules.
Open calculatorTax and Planning Calculators
Pension Calculator
Compare a pension stream with a lump-sum offer using COLA, discount rate, retiree years, and survivor percentage/additional years.
Open calculatorTax and Planning Calculators
Real Estate Calculator
Calculate a real-estate project or flip's all-in cost, net sale proceeds, profit, return on cost, annualized return, and break-even sale price.
Open calculatorTax and Planning Calculators
Retirement Calculator
Project savings to retirement and present-value the inflation-growing portfolio withdrawals needed through life expectancy after other income.
Open calculatorTax and Planning Calculators
RMD Calculator
Calculate a required minimum distribution from prior year-end balance using the IRS Uniform Lifetime Table or a user-supplied divisor, with Roth owner handling.
Open calculatorTax and Planning Calculators
Roth IRA Calculator
Project Roth IRA growth and compare it with a simplified taxable account subject to annual return tax drag.
Open calculatorTax and Planning Calculators
Salary Calculator
Convert pay among hourly, daily, weekly, biweekly, semimonthly, monthly, and annual amounts using entered work schedule and unpaid days.
Open calculatorTax and Planning Calculators
Social Security Calculator
Adjust an official full-retirement-age benefit for claim age using SSA early-claim reductions and entered delayed credits, then project COLA-adjusted lifetime benefits.
Open calculatorTax and Planning Calculators
Take Home Pay Calculator
Calculate annual and per-paycheck take-home pay from entered progressive brackets, deductions, payroll tax, and state/local rate.
Open calculatorTax and Planning Calculators
VAT Calculator
Solve net amount, VAT amount, and VAT-inclusive gross amount from a known net, gross, or tax value and entered VAT rate.
Open calculator2
Health, Time, and Daily Life
Health, nutrition, clinical, date, time, and lifestyle calculations organized by purpose.
Health Calculators
Body measurements, nutrition, pregnancy, clinical values, dosage, and wellness calculations.
Health Calculators
Anorexic BMI Calculator
Calculate adult BMI, WHO-style thinness bands, and the weight corresponding to BMI 18.5 without presenting BMI as an anorexia diagnosis.
Open calculatorHealth Calculators
Army Body Fat Calculator
Apply the current U.S. Army waist-to-height screening benchmark or calculate the rescinded 2023 one-site body-fat estimate for historical comparison.
Open calculatorHealth Calculators
BAC Calculator
Estimate blood alcohol concentration from explicit drink volumes and ABV, body weight, sex-specific Widmark ratio, elapsed time, and elimination rate.
Open calculatorHealth Calculators
BMI Calculator
Calculate body mass index from height and weight.
Open calculatorHealth Calculators
BMR Calculator
Calculate basal metabolic rate using the Mifflin-St Jeor equation.
Open calculatorHealth Calculators
Body Fat Calculator
Estimate body fat percentage with the U.S. Navy circumference method.
Open calculatorHealth Calculators
Body Surface Area Calculator
Estimate body surface area with the Mosteller, Du Bois, Haycock, Gehan-George, and Boyd equations.
Open calculatorHealth Calculators
Body Type Calculator
Classify fashion-industry body shape from bust, waist, high-hip, and hip measurements and report waist-to-hip ratio separately.
Open calculatorHealth Calculators
Bra Size Calculator
Estimate a starting bra size from full-bust and snug-underbust measurements and show US, UK, EU, French, and Australian equivalents.
Open calculatorHealth Calculators
Calorie Calculator
Estimate BMR, maintenance calories, and a weight-change calorie target with Mifflin-St Jeor or body-fat-based Katch-McArdle.
Open calculatorHealth Calculators
Calories Burned Calculator
Estimate gross and net activity calories from body weight, duration, and a named activity's MET value.
Open calculatorHealth Calculators
Carbohydrate Calculator
Convert a daily calorie target and carbohydrate percentage range into calories and grams per day.
Open calculatorHealth Calculators
Child Height Predictor Calculator
Estimate a child's adult height from parental heights using the mid-parental method and show metric and US customary results.
Open calculatorHealth Calculators
Conception Calculator
Estimate conception timing and the intercourse window from a target due date or a known last menstrual period.
Open calculatorHealth Calculators
Fat Intake Calculator
Convert calorie intake into a configurable total-fat gram range and saturated-fat gram limit.
Open calculatorHealth Calculators
GFR Calculator
Estimate adult GFR with the race-free 2021 CKD-EPI creatinine equation or pediatric GFR with revised bedside Schwartz.
Open calculatorHealth Calculators
Healthy Weight Calculator
Calculate an adult BMI-based weight interval for a given height, with editable lower and upper BMI boundaries.
Open calculatorHealth Calculators
Ideal Weight Calculator
Compare the Devine, Robinson, Miller, and Hamwi historical ideal-body-weight equations with the BMI 18.5-24.9 range.
Open calculatorHealth Calculators
Lean Body Mass Calculator
Estimate lean body mass with the Boer, James, and Hume equations and compare their average with total body weight.
Open calculatorHealth Calculators
Macro Calculator
Split a calorie target into exact protein, carbohydrate, and fat calorie and gram targets using percentages that must total 100.
Open calculatorHealth Calculators
Molecular Weight Calculator
Parse chemical formulas with all 118 element symbols, nested parentheses/brackets, coefficients, and hydrate separators to calculate molar mass and composition.
Open calculatorHealth Calculators
One Rep Max Calculator
Estimate one-repetition maximum with Epley, Brzycki, Lombardi, and combined estimates.
Open calculatorHealth Calculators
Overweight Calculator
Calculate adult BMI category and quantify weight above the BMI-25 threshold for the entered height.
Open calculatorHealth Calculators
Ovulation Calculator
Predict ovulation, six-day fertile windows, and corresponding due dates across up to twelve regular cycles.
Open calculatorHealth Calculators
Pace Calculator
Convert race distance and elapsed time into pace per kilometer, pace per mile, and average speed.
Open calculatorHealth Calculators
Period Calculator
Project future period start and end dates from the last known start, average cycle length, and typical bleeding duration.
Open calculatorHealth Calculators
Pregnancy Calculator
Calculate due date, estimated LMP and conception, gestational age, trimester, and milestones from five pregnancy dating methods.
Open calculatorHealth Calculators
Pregnancy Conception Calculator
Back-calculate a central conception estimate and uncertainty window from a due date, last period, or dated ultrasound.
Open calculatorHealth Calculators
Pregnancy Weight Gain Calculator
Apply CDC/IOM pre-pregnancy BMI ranges for singleton or twin total weight gain and compare current singleton gain with a week-specific model.
Open calculatorHealth Calculators
Protein Calculator
Calculate a weight-based daily protein range for sedentary adults, older adults, endurance or strength training, or pregnancy.
Open calculatorHealth Calculators
Shoe Size Conversion Calculator
Convert among measured foot length, Mondopoint, US, UK, and EU shoe sizes with separate men's, women's, and children's formulas.
Open calculatorHealth Calculators
Sleep Calculator
Calculate bedtimes from a required wake time or wake times from a bedtime using configurable latency, cycle length, and cycle count.
Open calculatorHealth Calculators
Target Heart Rate Calculator
Calculate exercise zones with either percent of estimated maximum heart rate or the Karvonen heart-rate-reserve method.
Open calculatorHealth Calculators
TDEE Calculator
Calculate total daily energy expenditure from BMR and activity multiplier.
Open calculatorHealth Calculators
Weight Calculator
Convert mass among kilograms, metric units, pounds, ounces, stones, tons, carats, grains, and unified atomic mass units.
Open calculatorHealth Calculators
Weight Watchers Points Calculator
Estimate food points with one of three clearly dated historical formulas while distinguishing them from current proprietary personalized programs.
Open calculatorDate and Time Calculators
Dates, ages, durations, business days, time zones, countdowns, and schedules.
Date and Time Calculators
Age Calculator
Calculate age in years, months, and days between two dates.
Open calculatorDate and Time Calculators
Date Calculator
Add or subtract calendar years, months, weeks, and days from a starting date with end-of-month handling.
Open calculatorDate and Time Calculators
Date Difference Calculator
Calculate the signed and absolute calendar-day difference between two dates.
Open calculatorDate and Time Calculators
Day Counter
Count calendar days, weekdays, weekend days, and business days between two dates with optional holiday exclusions.
Open calculatorDate and Time Calculators
Day of the Week Calculator
Find a date's weekday, ordinal day, ISO week date, quarter, and leap-year status.
Open calculatorDate and Time Calculators
Hours Calculator
Add and subtract a list of hour-minute-second durations and report exact and decimal totals.
Open calculatorDate and Time Calculators
Pregnancy Due Date Calculator
Estimate pregnancy due date from LMP, conception, IVF transfer, or ultrasound gestational age and show key milestones.
Open calculatorDate and Time Calculators
Time Calculator
Add or subtract two day-hour-minute-second durations and normalize the signed result.
Open calculatorDate and Time Calculators
Time Card Calculator
Calculate daily and weekly paid hours, overtime, and gross pay from timestamped shifts and unpaid breaks.
Open calculatorDate and Time Calculators
Time Duration Calculator
Calculate duration between two times on the same day.
Open calculatorDate and Time Calculators
Time Zone Calculator
Convert a wall-clock date and time between explicit UTC offsets without hidden browser-zone assumptions.
Open calculatorLifestyle Calculators
Practical everyday calculations for personal decisions and household planning.
Lifestyle Calculators
Golf Handicap Calculator
Estimate a WHS Handicap Index from 3 to 20 eligible 18-hole rounds, or convert an existing index into Course and Playing Handicaps.
Open calculatorLifestyle Calculators
GPA Calculator
Calculate term and cumulative GPA from course credits and letter or numeric grade points, with a selectable A+ scale.
Open calculatorLifestyle Calculators
Grade Calculator
Calculate a weighted course grade and the average required on remaining assignments to reach a target grade.
Open calculatorLifestyle Calculators
Love Calculator
Generate a clearly labeled entertainment name score and summarize four user-entered relationship check-in ratings without claiming predictive validity.
Open calculator3
Math, Measurement, and Construction
General mathematics, geometry, construction quantities, and unit-conversion tools.
General Math Calculators
Arithmetic, percentages, fractions, equations, sequences, probability, and general mathematical tools.
General Math Calculators
Basic Calculator
Perform one selected arithmetic operation on two numbers, including remainder and exponentiation.
Open calculatorGeneral Math Calculators
Big Number Calculator
Calculate exactly with integers larger than JavaScript's ordinary safe-number range.
Open calculatorGeneral Math Calculators
Common Factor Calculator
List every positive factor shared by two or more whole numbers.
Open calculatorGeneral Math Calculators
Distance Calculator
Calculate 2D coordinate distance, 3D coordinate distance, or great-circle distance between latitude-longitude points.
Open calculatorGeneral Math Calculators
Exponent Calculator
Calculate base raised to an exponent.
Open calculatorGeneral Math Calculators
Factor Calculator
Find all positive factors and factor pairs of a nonzero whole number.
Open calculatorGeneral Math Calculators
Fraction Calculator
Add, subtract, multiply, or divide two fractions and simplify the exact result.
Open calculatorGeneral Math Calculators
GDP Calculator
Calculate expenditure-based gross domestic product, net exports, GDP per capita, and growth from a prior GDP value.
Open calculatorGeneral Math Calculators
Greatest Common Factor Calculator
Calculate the greatest common factor of two or more whole numbers and show the reduction steps.
Open calculatorGeneral Math Calculators
Least Common Multiple Calculator
Calculate the least common multiple of two or more nonzero whole numbers.
Open calculatorGeneral Math Calculators
Log Calculator
Calculate a logarithm for any positive base except 1.
Open calculatorGeneral Math Calculators
Long Division Calculator
Divide two whole numbers and show quotient, remainder, decimal value, and digit-by-digit long-division steps.
Open calculatorGeneral Math Calculators
Matrix Calculator
Add, subtract, multiply, transpose, invert, or find the determinant of numeric matrices.
Open calculatorGeneral Math Calculators
Mileage Calculator
Calculate fuel economy, trip fuel cost, and cost per distance in metric and US customary units.
Open calculatorGeneral Math Calculators
Number Sequence Calculator
Analyze a numeric sequence, identify common patterns, and project the next terms.
Open calculatorGeneral Math Calculators
Percent Calculator
Calculate percentages, percent change, and what percent one number is of another.
Open calculatorGeneral Math Calculators
Percent Error Calculator
Calculate signed error, absolute error, relative error, and percent error against an accepted value.
Open calculatorGeneral Math Calculators
Percent Off Calculator
Calculate discount savings, sale price, optional sales tax, and quantity total.
Open calculatorGeneral Math Calculators
Permutation and Combination Calculator
Calculate nPr and nCr for a selected n and r.
Open calculatorGeneral Math Calculators
Prime Factorization Calculator
Decompose a positive whole number into prime powers and derive divisor properties.
Open calculatorGeneral Math Calculators
Quadratic Formula Calculator
Solve ax^2 + bx + c = 0.
Open calculatorGeneral Math Calculators
Ratio Calculator
Simplify a two-part ratio and calculate its decimal, percentage, and equivalent scaled ratio.
Open calculatorGeneral Math Calculators
Root Calculator
Calculate the nth root of a number.
Open calculatorGeneral Math Calculators
Rounding Calculator
Round a number to a selected decimal place using nearest, ceiling, floor, or toward-zero rules.
Open calculatorGeneral Math Calculators
Scientific Calculator
Evaluate a mathematical expression with parentheses, powers, constants, logarithms, roots, and trigonometric functions.
Open calculatorGeneral Math Calculators
Scientific Notation Calculator
Convert a number to scientific notation.
Open calculatorGeneral Math Calculators
Slope Calculator
Calculate slope from two points.
Open calculatorGeometry and Construction Calculators
Area, volume, materials, dimensions, concrete, roofing, flooring, and construction quantities.
Geometry and Construction Calculators
Area Calculator
Calculate area for rectangle, triangle, or circle.
Open calculatorGeometry and Construction Calculators
Circle Calculator
Calculate diameter, circumference, and area from radius.
Open calculatorGeometry and Construction Calculators
Concrete Calculator
Estimate concrete volume, bag counts, waste allowance, and cost for slabs, walls, footings, or round columns.
Open calculatorGeometry and Construction Calculators
Gravel Calculator
Estimate compacted gravel volume, purchase volume, weight, and cost from area, depth, density, and waste.
Open calculatorGeometry and Construction Calculators
Mulch Calculator
Estimate mulch volume and the number of bags required from area, depth, waste, and bag size.
Open calculatorGeometry and Construction Calculators
Pythagorean Theorem Calculator
Calculate the hypotenuse from two right-triangle legs.
Open calculatorGeometry and Construction Calculators
Right Triangle Calculator
Calculate hypotenuse, perimeter, area, and acute angles from the two perpendicular legs of a right triangle.
Open calculatorGeometry and Construction Calculators
Roofing Calculator
Estimate sloped roof area, roofing squares, bundles, waste, and material cost from plan dimensions and pitch.
Open calculatorGeometry and Construction Calculators
Square Footage Calculator
Total the area and perimeter of multiple rectangular rooms or sections entered on separate rows.
Open calculatorGeometry and Construction Calculators
Stair Calculator
Design a straight stair from total rise, target riser height, tread depth, and stair width.
Open calculatorGeometry and Construction Calculators
Surface Area Calculator
Calculate total surface area and volume for a rectangular prism, cube, sphere, cylinder, or cone.
Open calculatorGeometry and Construction Calculators
Tile Calculator
Estimate tile count, purchase area, boxes, grout-line effect, waste, and cost for a rectangular installation.
Open calculatorGeometry and Construction Calculators
Tire Size Calculator
Compare two metric tire sizes, including sidewall, overall diameter, circumference, revolutions, clearance, and speedometer error.
Open calculatorGeometry and Construction Calculators
Triangle Calculator
Solve perimeter, area, semiperimeter, and all angles of a triangle from three side lengths.
Open calculatorGeometry and Construction Calculators
Volume Calculator
Calculate volume for box, cylinder, or sphere.
Open calculatorUnit Conversion Calculators
Convert common measurements while preserving units and calculation steps.
Unit Conversion Calculators
Conversion Calculator
Convert dropdown-selected units across length, area, volume, mass, time, temperature, pressure, energy, physics, chemistry, biology, space, air, and digital quantities.
Open calculatorUnit Conversion Calculators
Length and Land Unit Conversion Calculator
Convert dropdown-selected linear length or land-area units, including kilometer, meter, yard, marla, kanal, acre, and square feet.
Open calculator4
Science and Technology
Science, engineering, and developer calculators for formulas, systems, and technical work.
Science and Engineering Calculators
Physics, chemistry, electrical, mechanical, and engineering formula calculators.
Science and Engineering Calculators
BTU Calculator
Estimate room cooling capacity from floor area, ceiling height, occupants, room use, insulation, sun exposure, and climate.
Open calculatorScience and Engineering Calculators
Density Calculator
Calculate density from mass and volume.
Open calculatorScience and Engineering Calculators
Dew Point Calculator
Solve dew point, relative humidity, or air temperature from the other two values using the August-Roche-Magnus relation.
Open calculatorScience and Engineering Calculators
Distance from Speed and Time Calculator
Calculate travel distance from speed and elapsed time.
Open calculatorScience and Engineering Calculators
Electricity Calculator
Estimate appliance energy use, monthly and annual electricity cost, and optional emissions from power and operating time.
Open calculatorScience and Engineering Calculators
Engine Horsepower Calculator
Estimate quarter-mile engine horsepower from elapsed time or trap speed with explicit vehicle-weight conversion.
Open calculatorScience and Engineering Calculators
Half-Life Calculator
Solve any variable in exponential half-life decay and convert among half-life, decay constant, and mean lifetime.
Open calculatorScience and Engineering Calculators
Horsepower Calculator
Calculate mechanical power and convert it to watts, kilowatts, mechanical horsepower, and metric horsepower.
Open calculatorScience and Engineering Calculators
Mass Calculator
Calculate mass from density and volume with independent density and volume unit conversion.
Open calculatorScience and Engineering Calculators
Molarity Calculator
Solve mass, molar mass, solution volume, or molarity from the other three quantities.
Open calculatorScience and Engineering Calculators
Ohms Law Calculator
Calculate voltage, current, resistance, and power when voltage and current are entered.
Open calculatorScience and Engineering Calculators
Resistor Calculator
Decode 4-band or 5-band resistor colors or calculate equivalent resistance for series and parallel networks.
Open calculatorScience and Engineering Calculators
Speed Calculator
Calculate speed from distance and time.
Open calculatorScience and Engineering Calculators
Voltage Drop Calculator
Calculate resistive voltage drop for DC, single-phase AC, or three-phase AC circuits from current, length, and conductor resistance.
Open calculatorScience and Engineering Calculators
Wind Chill Calculator
Calculate National Weather Service wind chill from air temperature and wind speed with formula-validity checks.
Open calculatorDeveloper Tools
Encoding, parsing, formatting, networking, storage, and software-development utilities.
Developer Tools
Bandwidth Calculator
Convert data units, calculate transfer time, estimate website traffic, or convert monthly usage to average bandwidth.
Open calculatorDeveloper Tools
Base64 Encode Decode
Encode or decode Base64 text.
Open calculatorDeveloper Tools
Binary Calculator
Add, subtract, multiply, or divide binary integers and convert the exact result to decimal, octal, and hexadecimal.
Open calculatorDeveloper Tools
Hex Calculator
Perform exact hexadecimal integer arithmetic and convert results to decimal, binary, and octal.
Open calculatorDeveloper Tools
IP Subnet Calculator
Calculate IPv4 or IPv6 network ranges from an address and CIDR prefix, including masks and host counts where applicable.
Open calculatorDeveloper Tools
Random Number Generator
Generate up to 10,000 uniform random integers with optional uniqueness and no hidden 100-number cap.
Open calculatorDeveloper Tools
Random Password Generator
Generate one or more cryptographically random passwords with explicit character-set and ambiguity controls.
Open calculatorDeveloper Tools
Roman Numeral Converter
Convert Arabic integers, Roman numerals, or separated date components in either direction with canonical validation.
Open calculatorDeveloper Tools
URL Encode Decode
Encode or decode URL text.
Open calculatorDeveloper Tools
Virtual Dice Roller
Roll any supported number of fair virtual dice, display each die face, and summarize the roll.
Open calculatorNo calculator matched that search
Try a calculator name, formula, unit, or broader category.