Compare calculators

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

Bayes' Theorem Calculator

Compute the posterior probability P(A|B) from a prior belief, a likelihood, and a false-positive rate. Use it for medical testing, spam filtering, or any scenario where you update beliefs with new evidence.

Prior Probability P(A)

Likelihood P(B|A)

Likelihood P(B|¬A)

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Probability

Hypothesis Test Calculator

Run a one-sample z-test or t-test to determine whether a sample mean significantly differs from a hypothesized population mean. Essential for quality control, clinical trials, and academic research.

Sample Mean

Hypothesized Mean (μ₀)

Sample Standard Deviation

Sample Size (samples)

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Key differences

	Bayes' Theorem Calculator	Hypothesis Test Calculator
Category	Probability	Probability
Inputs required	3	4
Result	Posterior Probability P(A\|B)	Test Statistic
What it does	Compute the posterior probability P(A\|B) from a prior belief, a likelihood, and a false-positive rate. Use it for medical testing, spam filtering, or any scenario where you update beliefs with new evidence.	Run a one-sample z-test or t-test to determine whether a sample mean significantly differs from a hypothesized population mean. Essential for quality control, clinical trials, and academic research.