Donaldson R F Free Pet Tools
Age calculators and care helpers for dogs, cats and other pets.
10 free tools in this category. No sign-up, no limits.
Dog Age Calculator
Convert a dog's age to human years with a published 2020 formula, and see the AAHA life stage. An estimate, not vet advice.
Open tool →Cat Age Calculator
Estimate your cat’s age in human years as a range, and see its AAHA/AAFP life stage. A rough guide from published rules of thumb, not veterinary advice.
Open tool →Horse Age Calculator
Estimate your horse’s age in human years as a range, with the ages at which vets call a horse aged or very old. A rough guide, not veterinary advice.
Open tool →Rabbit Age Calculator
Estimate your rabbit’s age in human years as a range and see its life stage, using RSPCA stages and popular rules of thumb. Not veterinary advice.
Open tool →Guinea Pig Age Calculator
See your guinea pig’s life stage (juvenile, adult, senior) and how far through a typical 4–8 year lifespan it is. No human years: that would be a guess.
Open tool →Hamster Age Calculator
See how far through a typical 2–3 year lifespan your hamster is. We show no human years or life stages, because the sources we read give none.
Open tool →Budgerigar Age Calculator
See how far through a typical 8–12 year lifespan your budgie is. Reported lifespans vary widely, and we show no human years because that would be a guess.
Open tool →Cockatiel Age Calculator
See how far through a reported 10–25 year lifespan your cockatiel is. Sources disagree widely, so we show only a share of lifespan, never human years.
Open tool →Tortoise and Turtle Age Calculator
See published lifespans for common pet tortoises and terrapins, with a strong warning that ages are rarely known. No human years, no false precision.
Open tool →Pet Age Calculators
Pet age calculators for dogs, cats, horses, rabbits, guinea pigs, hamsters, budgies, cockatiels and tortoises, each labelled by how far to trust it.
Open tool →