// multi-utility computation suite · offline · instant · precise
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sci.biodiversity-rarefaction Calculator
Calculates species richness rarefaction curves — the expected number of species in a random subsample of n individuals from a larger community. Rarefaction allows fair comparison of species richness between samples of different sizes — it standardises effort before comparing biodiversity across sites.
Inputs
Species Count
Reference formula or conversion factor shown for context.
Individuals Sampled
Reference formula or conversion factor shown for context.
Total Species Estimate
Reference formula or conversion factor shown for context.
Results
sampling completeness
Sample size or count used in the calculation.
rarefied richness at N=50
The value at the specified point or condition.
species density (sp/individual)
Sample size or count used in the calculation.
Chao1 estimator S_est
The value at the specified point or condition.
Good-Turing coverage estimate
The fraction of the total that is protected, tested, or accounted for. Higher coverage reduces risk of gaps.