GraphPad StatMate is a power and sample size calculator from GraphPad Software designed to help researchers and students plan studies with adequate statistical power. It provides a simple, guided workflow to define effect size, variability, significance level (alpha), and desired power, then calculates the number of subjects or replicates needed. StatMate supports commonly used tests, including unpaired and paired t tests, one-way ANOVA, linear regression/correlation, and 2x2 contingency table analyses (chi-square or Fisher’s exact test). It can also report the power achieved for a given sample size. Clear summaries and straightforward plots illustrate how power varies with sample size and effect size, making tradeoffs easy to understand. By streamlining rigorous study design, StatMate helps reduce underpowered studies, justify sample sizes in protocols and grant applications, and teach the fundamentals of power analysis.
GraphPad StatMate is developed by GraphPad Software. The most popular version of this product among our users is 2.0. The name of the program executable file is statmate.exe.
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