Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Statistics
Statistical Power Calculator
Determine the statistical power of a hypothesis test given effect size, sample size, and alpha level. Use it when designing experiments to confirm you have enough participants to detect a real effect.
Fill in the required fields to see your result.
Statistics
Linear Regression Calculator
Fit a least-squares linear regression and read off the slope of the best-fit line y = a + b·x, using summary statistics (n, Σx, Σy, Σxy, Σx²) of paired x and y data. Used for trend analysis, forecasting, and quantifying how much y changes per unit change in x.
Fill in the required fields to see your result.
Key differences
| Statistical Power Calculator | Linear Regression Calculator | |
|---|---|---|
| Category | Statistics | Statistics |
| Inputs required | 4 | 5 |
| Result | Statistical Power | Slope (b) |
| What it does | Determine the statistical power of a hypothesis test given effect size, sample size, and alpha level. Use it when designing experiments to confirm you have enough participants to detect a real effect. | Fit a least-squares linear regression and read off the slope of the best-fit line y = a + b·x, using summary statistics (n, Σx, Σy, Σxy, Σx²) of paired x and y data. Used for trend analysis, forecasting, and quantifying how much y changes per unit change in x. |