How is cat age converted to human years?

The AAFP/AAHA Feline Life Stage Guidelines treat the first year as roughly 15 human years and the second year as 9 more (total 24). After year two, each cat year adds about 4 human years. So a 5-year-old cat is around 36 in human years.

What are the cat life stages?

Cat life stages are kitten (under 1 year), junior (1–2), adult (3–6), mature (7–10), senior (11–14), and geriatric (15+). These boundaries follow the AAFP guidelines used by most feline-only veterinary clinics worldwide.

How long do cats live?

Indoor cats typically live 13–17 years, while outdoor cats average 7–10 years due to higher exposure to traffic, predators, and disease. Sprint 1 of this calculator uses 15 years as the indoor default and 10 years for outdoor.

Cat Age Calculator & Lifespan Hub

Convert your cat's age to human years using AAFP feline life-stage guidelines. Browse 20 breeds, 20 age guides, breed comparisons, and FAQs.

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Cat Age Calculator

Calculate your cat's age in human years using the AAFP feline guidelines.

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Popular Breeds

Persian

Medium (10-25kg)
14 years

Maine Coon

Large (25-45kg)
13 years

Siamese

Medium (10-25kg)
15 years

British Shorthair

Medium (10-25kg)
15 years

Ragdoll

Large (25-45kg)
14 years

Bengal

Medium (10-25kg)
14 years

Cat Breeds

Abyssinian

Medium (10-25kg)
14 years

American Shorthair

Medium (10-25kg)
16 years

Bengal

Medium (10-25kg)
14 years

Birman

Medium (10-25kg)
14 years

British Shorthair

Medium (10-25kg)
15 years

Burmese

Medium (10-25kg)
16 years

Devon Rex

Small (<10kg)
13 years

Domestic Shorthair

Medium (10-25kg)
14 years

Egyptian Mau

Medium (10-25kg)
14 years

Japanese Bobtail

Medium (10-25kg)
15 years

Maine Coon

Large (25-45kg)
13 years

Norwegian Forest Cat

Large (25-45kg)
15 years

Oriental Shorthair

Medium (10-25kg)
14 years

Persian

Medium (10-25kg)
14 years

Ragdoll

Large (25-45kg)
14 years

Russian Blue

Medium (10-25kg)
16 years

Scottish Fold

Medium (10-25kg)
13 years

Siamese

Medium (10-25kg)
15 years

Sphynx

Medium (10-25kg)
13 years

Tonkinese

Medium (10-25kg)
15 years

Browse by Age

Each row shows the human-equivalent age and life stage. Jump to a specific year via the table below.

Pet age (years)	Human years	Life stage
1	15	Junior
2	24	Adult
3	28	Adult
4	32	Adult
5	36	Adult
6	40	Adult
7	44	Mature
8	48	Mature
9	52	Mature
10	56	Mature
11	60	Senior
12	64	Senior
13	68	Senior
14	72	Senior
15	76	Geriatric
16	80	Geriatric
17	84	Geriatric
18	88	Geriatric
19	92	Geriatric
20	96	Geriatric

Breed Comparisons

Maine Coon vs Norwegian Forest Cat Siamese vs Oriental Shorthair Persian vs British Shorthair Ragdoll vs Birman Bengal vs Egyptian Mau British Shorthair vs American Shorthair

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