Sample Size and Power Calculators
Power Calculator for ANOVA
Power Calculator for ANOVA estimate power for ANOVA.
Sample Size and Power Calculators
Power Calculator for ANOVA
Estimate power for ANOVA.
Formula
Balanced fixed-effects one-way ANOVA power is the upper-tail probability of a noncentral F distribution with df1 = k - 1, df2 = N - k, and noncentrality N*f^2.
About the Power Calculator for ANOVA
Estimate power for ANOVA. Planning calculators connect effect size, precision, alpha, power, group count, and sample size for the specific design shown.
How the Power Calculator for ANOVA Works
Balanced fixed-effects one-way ANOVA power is the upper-tail probability of a noncentral F distribution with df1 = k - 1, df2 = N - k, and noncentrality N*f^2.
The calculation runs in your browser. Submitted values are validated for the required numeric range, data shape, units, and method-specific restrictions before a result is shown.
Required Inputs
- Cohen f effect size (required)
- Groups count (required)
- Sample size per group (required)
- Alpha (required)
Results Reported
The result panel shows the final answer together with the intermediate quantities needed to audit the calculation. Depending on this method, reported values include:
methodeffect_size_fgroupssample_size_per_grouptotal_sample_sizedf_betweendf_withinalphacritical_fnoncentrality_parameterexact_powerpower
Power Calculator for ANOVA Example
Use the example data button to load a known sample, then calculate and review the statistic, p-value or estimate, and interpretation.
| Input | Example value |
|---|---|
| Cohen f effect size | 0.25 |
| Groups count | 3 |
| Sample size per group | 52 |
| Alpha | 0.05 |
How to Use the Calculator
- Confirm that the calculator title and method match the quantity, test, conversion, or planning question you need to solve.
- Enter values with compatible units and the requested sample, group, matrix, count, date, or option format.
- Select Example Data to inspect a valid input layout, or enter your own values and select Calculate.
- Review the result table, formula, worked substitutions, warnings, and interpretation rather than using only the headline number.
- Use Copy Result or Download CSV when you need a reusable record of the displayed calculation.
Understanding the Result
Planning assumptions should be justified before data collection; attrition, clustering, unequal allocation, and multiplicity may require a larger design.
Keep the entered values, units, selected options, and any warning shown beside the result. For a hypothesis test, report the statistic, degrees of freedom where applicable, p-value, alpha level, effect size, and decision. For an estimate or conversion, report the formula convention and final unit.
Accuracy and Limitations
The calculator keeps full browser precision during calculation and rounds only for display. Accuracy still depends on correct inputs and on whether the displayed model represents the real problem. Educational calculators cannot replace required professional review, current official rules, field measurements, laboratory methods, or specialist statistical software where those are necessary.
Frequently Asked Questions
What does the Power Calculator for ANOVA calculate?
Estimate power for ANOVA.
Which formula does the Power Calculator for ANOVA use?
Balanced fixed-effects one-way ANOVA power is the upper-tail probability of a noncentral F distribution with df1 = k - 1, df2 = N - k, and noncentrality N*f^2.
What input does this calculator need?
The calculator form shows the required values and validates them before calculating.
Are the formulas visible?
Yes. Each calculator displays its method, assumptions, and interpretation unless disabled by the site administrator.