Personal Finance and Investing
NPV Calculator
NPV Calculator discount a series of period cash inflows against an initial investment to calculate net present value.
Personal Finance and Investing
NPV Calculator
Discount a series of period cash inflows against an initial investment to calculate net present value.
Formula
NPV = -initial investment + sum(CF_t/(1+r)^t), for t=1..n.
About the NPV Calculator
Discount a series of period cash inflows against an initial investment to calculate net present value.
How the NPV Calculator Works
Each entered future cash flow is discounted by its period number at the entered periodic rate, then the initial outlay is subtracted.
Formula
NPV = -initial investment + sum(CF_t/(1+r)^t), for t=1..n.
The calculation runs in your browser. Values are validated for required ranges, compatible units, and method-specific restrictions before results are displayed.
Required Inputs
- Initial investment (required).
- Discount rate per period (required) - enter in %.
- Future cash flows by period (required).
Results Reported
The result panel reports the final answer and the intermediate quantities needed to check the calculation:
- Cash-flow periods
- Present value of inflows
- Net present value
- Profitability index
- Discounted cash flows
NPV Calculator Example
Select Example Data in the calculator to load this reproducible input set:
| Input | Example value |
|---|---|
| Initial investment | 10000 |
| Discount rate per period | 10 % |
| Future cash flows by period | 3000, 4000, 5000 |
How to Use the Calculator
- Confirm that the calculator title and formula match the quantity you need.
- Enter every required value using the unit shown with its field.
- Select Example Data to inspect a valid input set, or enter your own values and select Calculate.
- Review all reported values and the displayed formula before using the answer.
- Use Copy Result or Download CSV when you need a reusable record.
Accuracy and Limitations
Use a rate and cash-flow interval with matching periods. NPV is sensitive to forecasts, terminal values, taxes, inflation, and risk assumptions.
Keep units consistent, use measurements that represent the actual situation, retain full precision during the calculation, and round only the final answer. Professional decisions may require current official rules, field measurements, laboratory methods, or specialist review.
Frequently Asked Questions
What does the NPV Calculator calculate?
Discount a series of period cash inflows against an initial investment to calculate net present value.
Which formula does the NPV Calculator use?
NPV = -initial investment + sum(CF_t/(1+r)^t), for t=1..n.
What should I verify before using this result?
Use a rate and cash-flow interval with matching periods. NPV is sensitive to forecasts, terminal values, taxes, inflation, and risk assumptions.