Species Richness Calculator
Calculate species richness indices and estimate total species diversity from sample data.
Input Parameters
Margalef: DMg = (S-1) / ln(N)
Chao1: S + F₁²/(2F₂)
F₁ = singletons, F₂ = doubletons
Observed Species Richness
15
species observed
Chao1 Estimate
17.0
Jackknife1
17.0
Margalef Index
2.633
Menhinick Index
1.050
Sampling Analysis
Completeness88.2%
Singletons2 species
Doubletons1 species
Species Density1.50/ha
Area Extrapolation26.7 species
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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.