T-Distribution Critical Values Table
Look up t-distribution critical values for any degrees of freedom. See one-tailed and two-tailed values at common alpha levels.
Degrees of Freedom
10.00
Critical Values Table
α = 0.10 (one-tailed): 1.372 α = 0.05 (one-tailed): 1.812 α = 0.025 (one-tailed): 2.228 α = 0.01 (one-tailed): 2.764 α = 0.005 (one-tailed): 3.169
One-tailed alpha levels
Two-Tailed 95% Value
2.23
α = 0.025 each tail
One-Tailed 95% Value
1.81
α = 0.05 one tail
Interpretation
For a two-tailed test at 95% confidence with 10 df, reject H₀ if |t| > 2.228