Fish Yield Calculator
The Fish Yield Calculator estimates expected harvest based on species growth rates, stocking density, feed conversion, and water conditions.
Biology
Explore our biology calculators designed to simplify complex biological concepts. From genetics to ecology and cell biology, these tools provide accurate calculations to support your studies and research.
Browse our 40 calculators to solve common problems in Biology — from quick estimates to detailed results. This hub links to our most-used tools and guides so you can get answers fast.
Start with the popular picks below, or jump into the full list for more specific use cases.
Additive Genetic Variance Calculator
The Additive Genetic Variance Calculator estimates additive genetic variance from heritability and phenotypic variance to inform breeding and selection decisions.
Catch per Unit Effort Calculator
The Catch per Unit Effort Calculator estimates fish abundance by standardising catch against effort metrics across gear types, trips, and time series.
Allometric Equation Calculator
The Allometric Equation Calculator estimates tree biomass and carbon stock from diameter, height and wood density using published scaling relationships.
Human Eye Distance Calculator
The Human Eye Distance Calculator estimates how perceived size and distance relate in human vision using basic geometry and biological assumptions.
Aquarium Salt Calculator
The Aquarium Salt Calculator calculates precise salt doses for freshwater and marine aquaria based on volume and target salinity.
Dead Space Ventilation Calculator
The Dead Space Ventilation Calculator estimates dead space fraction and ventilation efficiency using Bohr or Enghoff equations from carbon dioxide measurements.
Fixation Index Calculator
The Fixation Index Calculator calculates FST to quantify genetic differentiation between populations from allele frequency data and sample sizes.
Deer Weight Calculator
The Deer Weight Calculator estimates live body mass from chest girth and body length measurements, aiding wildlife researchers in population health assessments.
Goldfish per Gallon Calculator
The Goldfish per Gallon Calculator estimates safe stocking levels by modelling bioload from tank volume, fish size, and filtration efficiency.
Cremation Weight Calculator
The Cremation Weight Calculator predicts ash weight from body weight, sex, stature, and skeletal biology.
FRET Distance Calculator
The FRET Distance Calculator calculates donor-acceptor distances from FRET efficiency using the Förster radius, quantum yield and orientation factor.
Accumulated Degree Days Calculator
The Accumulated Degree Days Calculator computes cumulative heat units from temperature records to predict insect development, disease risk, and plant phenology.
Extraction Ratio Calculator
The Extraction Ratio Calculator calculates hepatic or renal extraction ratio from arterial and venous concentrations to assess physiological clearance.
Centimorgan to Percentage Converter
The Centimorgan to Percentage Converter converts Centimorgan to Percentage and helps interpret recombination frequencies in genetic linkage and mapping analyses.
Crop Water Stress Index Calculator
The Crop Water Stress Index Calculator calculates plant water stress from canopy and air temperatures, vapour pressure deficit, and calibration baselines.
dN/dS Ratio Calculator
The dN/dS Ratio Calculator computes non-synonymous to synonymous substitution ratios from coding sequence alignments to infer selection pressure.
Anogenital Ratio Calculator
The Anogenital Ratio Calculator calculates anogenital ratio from measured anogenital distance and body size, supporting sex differentiation and endocrine toxicity assessments.
Corn Heat Units Calculator
The Corn Heat Units Calculator calculates accumulated heat units from daily maximum and minimum temperatures to predict maize growth stages and maturity.