From growth rates to population, Wolfram|Alpha has animal-related calculators. Solve problems related to beef cattle adjusted birth weight, weaning weight and age adjusted weaning weight; cattle total percentage of retail product; beef cattle yield grade; human age to cat years or vice versa; dinosaur walking speed; Dolbear's law; perception of time; mammal growth rate; wet animal shaking frequency; the Lotka–Volterra predator‐prey model and the doubling formula.
