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Fisher’s Alpha Calculator An advanced parametric index tool for measuring species diversity using log-series distribution models. Total Number of Species ($S$) The total count of unique species identified in your sample dataset. Total Number of Individuals ($N$) The total sum of all individual organisms across all species. Calculate Fisher’s Alpha Calculation Results Fisher’s Alpha ($alpha$): […]

Margalef Index Calculator An advanced ecological tool to measure species richness and biodiversity standards. Total Number of Species ($S$) The count of different unique species observed in the community. Total Number of Individuals ($N$) The total count of all individuals across all species combined. Calculate Margalef Index Calculation Results Margalef Richness Index ($D_{mg}$): 0.0000 Ecological

Menhinick Index Calculator Calculate Menhinick’s Species Richness Index Number of Species (S): Total Number of Individuals (N): Calculate Menhinick Index Calculation Results About the Menhinick Index Calculator The Menhinick Index Calculator is a precise, user-friendly online tool for ecologists, researchers, agronomists, and students to compute Menhinick’s index of species richness. This index provides a standardized

Brillouin Index Calculator Calculate Brillouin Diversity Index Total Number of Individuals (N): + Add Another Species Calculate Brillouin Index Calculation Results About the Brillouin Index Calculator The Brillouin Index Calculator is a powerful, scientifically accurate tool designed for ecologists, researchers, students, and environmental professionals to compute the Brillouin diversity index. This index, rooted in information

McIntosh Index Calculator About the McIntosh Index Calculator The McIntosh Index Calculator is a free, scientifically precise online tool that computes the McIntosh diversity index and McIntosh evenness index from species abundance data. This McIntosh Index Calculator applies established geometric formulations from peer-reviewed ecology to quantify community structure, emphasizing both species richness and evenness in

Berger-Parker Index Calculator About the Berger-Parker Index Calculator The Berger-Parker Index Calculator is a free, scientifically accurate online tool that computes the Berger-Parker dominance index from species abundance data. This Berger-Parker Index Calculator provides a simple yet powerful way to quantify the degree of dominance by the most abundant species in ecological, microbiological, agricultural, or

Simpson’s Diversity Calculator About the Simpson’s Diversity Calculator The Simpson’s Diversity Calculator is a free, scientifically accurate online tool that computes Simpson’s Diversity Index and related metrics from species abundance data. This Simpson’s Diversity Calculator helps ecologists, microbiologists, agronomists, students, and researchers quickly evaluate community dominance and diversity using one of the most widely cited

Rarefaction Calculator The Rarefaction Calculator computes expected species richness E(S_n) using the standard individual-based rarefaction formula from ecology. It standardizes richness for different sample sizes, enabling fair comparisons based on peer-reviewed methods (Hurlbert 1971, Heck et al. 1975). About the Tool Input species abundances to calculate rarefied richness and view curve points. Ideal for biodiversity

Diversity Index Calculator The Diversity Index Calculator measures biodiversity using scientifically validated indices: Simpson’s (Gini-Simpson: 1 – ∑p_i²) and Shannon (H’ = -∑p_i ln(p_i)). Ideal for ecology, agriculture, and environmental studies, it quantifies species richness and evenness reliably. About the Tool Input species counts to instantly compute Simpson’s and Shannon indices. Perfect for agronomists, researchers,