Biology Calculators
Calculation involving biology, plants and animals
Botany
BotanyBulb Spacing CalculatorWork out how many flower bulbs a bed needs from its size, the bulb you are planting and the pattern you want, with an exact row by row layout for rectangular beds, area based estimates for circles, triangles and ovals, planting density, depth and order quantity.
BotanyBasal Area CalculatorFind the basal area of a tree from its DBH, roll a measured plot up into a stand density per acre or hectare, or estimate density with a prism.Zoology
ZoologyPuppy Weight CalculatorPredict your puppy's adult weight from its current weight, age, and size class. See a likely range, a growth curve, and when it will be full grown.
ZoologyHow Big Will My Cat Get CalculatorPredict your kitten's adult weight from its age and current weight, from its breed and sex, or from the sizes of both parents, with a growth chart and a plain-English range.
ZoologyDog Chocolate Toxicity CalculatorEstimate the methylxanthine dose in mg/kg from your dog's weight, the chocolate type, and the amount eaten, then see the severity level and what to do next.
ZoologyCricket Chirp Temperature CalculatorEstimate air temperature from cricket chirps with Dolbear's law. Count chirps over any window, pick the species, and read the temperature in °F, °C, or K, or solve backward for the chirp rate.
ZoologyAquarium Volume CalculatorWork out how much water your aquarium holds from its shape and dimensions, in gallons or litres, with the water weight and an allowance for fill level and substrate displacement.Ecology
EcologyCarrying Capacity CalculatorSolve the logistic growth model for carrying capacity, population, growth rate, or rate of change. Enter any three values and read the fourth, with charts and interpretation.
EcologyAllele Frequency CalculatorFind allele frequencies p and q and Hardy-Weinberg genotype frequencies from a recessive-trait prevalence, genotype counts, or allele counts - with carrier frequency and an equilibrium chi-square test.