Other Animal Calculators
Calculators for birds, horses, rabbits, rats, turtles, guinea pigs, hamsters, and crickets — age estimates, weight, cage and tank size, coat color, and dry matter.
All other animal calculators
Bird Age Calculator
Estimate a bird's age from species and physical characteristics like plumage.
Cricket Chirp Thermometer
Estimate temperature from cricket chirps using Dolbear's Law.
Dry Matter Calculator
Calculate dry matter percentage and weight from moisture content and total weight.
Guinea Pig Age Calculator
Estimate a guinea pig's age from teeth wear, fur condition, and mobility.
Hamster Age Calculator
Estimate a hamster's age from fur condition, eye clarity, and mobility.
Horse Weight Calculator
Estimate a horse's weight from heart girth and body length using the equine formula.
Rabbit Cage Size Calculator
Calculate minimum rabbit cage floor area from number of rabbits and breed size.
Rabbit Color Calculator
Predict possible rabbit offspring coat colors from parent color genes.
Rat Cage Calculator
Calculate minimum rat cage size and volume from the number of rats.
Turtle Tank Size Calculator
Calculate minimum turtle tank size in gallons and liters from shell length.
Frequently asked questions
A:Yes — Dolbear's Law estimates °F as chirps in 14 seconds + 40, accurate within ~1–2 °F for the snowy tree cricket.
A:Weight (kg) = (heart girth² × body length) ÷ 11877, using a measuring tape.
A:A common rule is 10 gallons per inch of shell length, plus basking space and filtration.
