Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

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.

Effect Size (Cohen's d)

Sample Size per Group

Alpha Level

Test Direction

Fill in the required fields to see your result.

Statistics

Linear Regression Calculator

Find the linear relationship between two variables by computing the slope, correlation coefficient, and R² from paired data points. Use it when analyzing trends in sales, scientific experiments, or any dataset where you want to predict one variable from another.

X Values (comma separated)

Y Values (comma separated)

Calculate

Fill in the required fields to see your result.

Key differences

	Statistical Power Calculator	Linear Regression Calculator
Category	Statistics	Statistics
Inputs required	4	3
Result	Statistical Power	Result
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.	Find the linear relationship between two variables by computing the slope, correlation coefficient, and R² from paired data points. Use it when analyzing trends in sales, scientific experiments, or any dataset where you want to predict one variable from another.