Cat Age Calculator
Convert cat years to human years with the standard veterinary formula, plus your cat's life stage. Updated for 2026.
Last reviewed July 2026 · Free · Nothing you enter is stored
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Educational estimate. Cats age fairly uniformly across breeds; your vet is the best judge of your cat's health stage.
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Find your cat's breed for life expectancy
Cats age at a similar rate regardless of breed, but life expectancy varies — pick your breed:
- Abyssinian12–15 yr lifespan
- American Curl12–16 yr lifespan
- American Shorthair15–20 yr lifespan
- Balinese12–20 yr lifespan
- Bengal12–16 yr lifespan
- Birman12–16 yr lifespan
- British Shorthair12–17 yr lifespan
- Burmese16–18 yr lifespan
- Chartreux11–15 yr lifespan
- Cornish Rex11–15 yr lifespan
- Devon Rex9–15 yr lifespan
- Domestic Longhair12–18 yr lifespan
- Domestic Shorthair12–18 yr lifespan
- Egyptian Mau12–15 yr lifespan
- Exotic Shorthair12–15 yr lifespan
- Himalayan9–15 yr lifespan
- Maine Coon12–15 yr lifespan
- Manx11–13 yr lifespan
- Munchkin12–15 yr lifespan
- Norwegian Forest Cat14–16 yr lifespan
- Ocicat12–15 yr lifespan
- Oriental Shorthair12–15 yr lifespan
- Persian10–17 yr lifespan
- Ragamuffin12–16 yr lifespan
- Ragdoll12–17 yr lifespan
- Russian Blue15–20 yr lifespan
- Savannah12–20 yr lifespan
- Scottish Fold11–15 yr lifespan
- Selkirk Rex10–15 yr lifespan
- Siamese15–20 yr lifespan
- Siberian11–18 yr lifespan
- Singapura11–15 yr lifespan
- Somali12–16 yr lifespan
- Sphynx9–15 yr lifespan
- Tonkinese12–16 yr lifespan
- Turkish Angora12–18 yr lifespan
Frequently asked questions
How do you convert cat years to human years?
The veterinary convention: a cat's first year equals about 15 human years, the second year adds 9 (so a 2-year-old cat ≈ 24), and every year after that adds roughly 4 human years. A 10-year-old cat is about 56 in human terms.
How long do indoor cats live?
Indoor cats commonly live 12–18 years, and many reach their early 20s. Outdoor and indoor-outdoor cats average considerably less due to traffic, predators, and disease. Breed matters too — Siamese and Burmese often live longest.
When is a cat considered senior?
Veterinarians generally consider cats 'mature' at 7–10, 'senior' at 11–14, and 'geriatric' at 15+. Senior cats benefit from twice-yearly vet visits to catch kidney disease, hyperthyroidism, and dental problems early.
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