About CatCalculatorOnline
CatCalculatorOnline.com is a free set of tools built for one thing: answering the everyday number questions cat owners actually ask. How old is my cat in human years? How much should I feed her? How long do indoor cats live? We give you a clear, science-based answer in seconds — no signup, no fuss.
What you can do here
- Cat Age Calculator — convert your cat's age to human years using real feline life-stage guidelines, not the old ×7 myth
- Feeding & calorie tools (rolling out) — how much to feed a kitten or an adult cat, by weight
- Lifespan, pregnancy, and cost tools (rolling out) — the rest of the numbers that come with cat parenting
Free, private, and accurate
Every tool is free and runs entirely in your browser — nothing you type is uploaded to us. And accuracy matters here: our aging math follows the feline life-stage framework used by the American Animal Hospital Association (AAHA) and the Cornell Feline Health Center. We don't sell cat food or insurance, so the numbers aren't tilted to sell you anything.
Why we built it
The existing "cat age" charts online are clunky, contradict each other, and often repeat the myth that one cat year equals seven human years (it doesn't). We wanted the version that's instant, honest, and genuinely useful. Spot a mistake or have an idea for a tool? Tell us on our contact page — getting the numbers right is the whole point.