Biology
Biology calculators
Nine focused tools spanning genetics, population biology, microbiology, and human biology.
Monohybrid Punnett square
Single-gene cross with genotype and phenotype ratios.
Open the calculator →Dihybrid Punnett square
Two-gene cross, 4×4 grid, 9:3:3:1 ratio for AaBb × AaBb.
Open the calculator →Sex-linked (X-linked) inheritance
Affected sons, affected daughters, carrier daughters.
Open the calculator →Hardy-Weinberg equilibrium
p + q = 1 and p² + 2pq + q² = 1, from any starting value.
Open the calculator →Allele frequency chi-square test
Goodness-of-fit χ² for observed AA, Aa, aa counts against Hardy-Weinberg expectation.
Open the calculator →Exponential population growth
N = N₀ · e^(rt). Solve for any of N, N₀, r, or t.
Open the calculator →Serial dilution factor
Cₖ = C₀ / d^k. Every tube concentration in a k-step series.
Open the calculator →Bacterial generation time
g = t / n where n = log₂(Nₜ/N₀). Includes specific growth rate μ.
Open the calculator →BMI and BMR
BMI category plus Mifflin-St Jeor BMR and TDEE for human-biology contexts.
Open the calculator →