Hardy-Weinberg Calculator

Calculate genotype frequencies (p², 2pq, q²) from allele frequencies using the Hardy-Weinberg equilibrium equation.

Dominant Allele Frequency (p)

Population Size

Tab to move between fields

Dominant Allele Freq (p)

0.6

Recessive Allele Freq (q)

0.4

AA Genotype Freq (p²)

0.36

Aa Genotype Freq (2pq)

0.48

aa Genotype Freq (q²)

0.16

Expected AA Individuals360

Expected Aa Individuals480

Expected aa Individuals160

How to Use This Calculator

Enter Dominant Allele Frequency (p) and Population Size.
Review Dominant Allele Freq (p), Recessive Allele Freq (q), and AA Genotype Freq (p²).
Use Aa Genotype Freq (2pq) and aa Genotype Freq (q²) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Dominant Allele Frequency (p)

Dominant Allele Frequency (p)	Dominant Allele Freq (p)	Recessive Allele Freq (q)	AA Genotype Freq (p²)
0.1	0.1	0.9	0.01
0.35	0.35	0.65	0.1225
0.65	0.65	0.35	0.4225
0.9	0.9	0.1	0.81

Dominant Allele Frequency (p): Frequency of the dominant allele in the population (0 to 1). The recessive allele frequency q is calculated as 1 - p.
Population Size: Total number of individuals in the population for expected count calculations.

p² + 2pq + q² = 1, where p + q = 1

Identify Input Parameters
Dominant Allele Frequency (p) = 0.6, Population Size = 1000 = 2 input(s) provided
Calculate Dominant Allele Freq
Dominant Allele Freq
0.6 = 0.6
Calculate Recessive Allele Freq
Recessive Allele Freq
0.4 = 0.4
Calculate AA Genotype Freq
AA Genotype Freq
0.36 = 0.36
Calculate Expected AA Individuals
Expected AA Individuals
360 = 360
Calculate Expected Aa Individuals
Expected Aa Individuals
480 = 480