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Type II Error Rate (Beta) from Power Calculator

β = 1 − power — probability of a false negative.

Calculates type II error rate β = 1 − power, type I error rate α, and the four outcomes of a hypothesis test with their probabilities (true/false positive/negative).

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

β = 1 − power; α = type I error; Power = 1 − β

In depth

Calculates type II error rate β = 1 − power, type I error rate α, and the four outcomes of a hypothesis test with their probabilities (true/false positive/negative).