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Free Cat Tools
Cat Calculators for Every Stage
Free tools for cat parents and breeders: estimate your cat's pregnancy due date, predict a kitten's adult size, explore coat color genetics, and convert her age into human years.
The Toolkit
Choose Your Cat Calculator
Each tool gives a clear estimate with an honest range, plus a reminder to check with your vet.
Cat Pregnancy & Gestation
Estimate her due date and kittening window from the mating date, with a week-by-week guide.
Open calculatorCat Coat Color Genetics
Predict kitten coat colors and patterns, including tortoiseshell and the X-linked orange gene.
Open calculatorCat Growth
Predict a kitten's adult size and weight from its current age, weight, and breed.
Open calculatorCat Age
Convert your cat's age into human years with the standard feline aging formula.
Open calculator