Shannon diversity index
Shannon diversity index: use species counts, logarithm base. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
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Formula & explanation
H = −Σ pᵢ log_b(pᵢ)
Variables & units
- Species counts
- comma separated
- Logarithm base
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Worked example
Use the example inputs to explore this model; the solution shows each supplied quantity.
Assumptions
Probabilities are estimated from counts; zero-count categories contribute zero.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
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