t-Test Calculator

Independent, paired, and one-sample t-tests with p-values, Cohen's d, and APA formatting.

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💡 Data stored locally in browser

Test Configuration

Test Type

Compare two different groups (e.g., control vs treatment)

Hypothesis

Assume equal variances (if unchecked, uses Welch's correction)

Data Input

Group 1

n = 0, M = —

Group 2

n = 0, M = —

💡 Quick Guide

• Paste directly from Excel (tab-separated values supported)
• Use spaces, commas, or line breaks to separate numbers
• Results update automatically as you type
• Click any result to copy to clipboard

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Enter Your Data

Results will appear here automatically as you input your data.