FST Calculator
Calculate FST (fixation index) to measure genetic differentiation between populations.
Input Data
FST Formula
FST = (Ht - Hs) / Ht
FST (Fixation Index)
0.0909
9.09% differentiation
Moderate - Moderate differentiation
Heterozygosity Values
Ht (Total)0.4950
Hs (Subpopulations)0.4500
Mean Frequency (p-bar)0.4500
Gene Flow Estimate
Nm (Migrants per Gen)2.5000
GST (Nei's)0.0909
D (Jost's)0.1636
Wright's Guidelines
0 - 0.05Little differentiation
0.05 - 0.15Moderate
0.15 - 0.25Great
>0.25Very great
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.