Biology calculators
Predict the offspring of genetic crosses and analyse allele and genotype frequencies in populations. Each calculator explains the genetics behind the numbers.
2 calculators
Hardy–Weinberg Calculator
Allele and genotype frequencies from counts, phenotypes or p and q, with a χ² test for equilibrium.
Punnett Square Calculator
Monohybrid to four-gene crosses with exact genotype and phenotype ratios, for complete, incomplete and codominant genes.
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About these calculators
The biology calculators focus on classical and population genetics. They make clear which results are expected values under a model and which come from observed data. That distinction matters when you test whether a real population matches a prediction.