Biology

Allele Frequency Calculator

Find allele frequencies from allele counts.

Calculated Output

Frequency of A (p) 0.6

Frequency of a (q) 0.4

Formula: p = A ÷ (A + a); q = 1 − p

Step-by-Step Breakdown

1. Values used:

2. Count of allele A = 60

3. Count of allele a = 40

5. Frequency of A (p) = 0.6

6. Frequency of a (q) = 0.4

Did this calculator solve your problem today?

The math behind it

p = count of A ÷ total alleles; q = 1 − p. Under Hardy–Weinberg, genotype frequencies are p², 2pq and q².

60 A, 40 a → p = 0.6, q = 0.4.

From genotypes?

Each individual carries two alleles; count them across all individuals.