How long do cats live?

Cats live longer than dogs, and the range is narrower. Most cats live twelve to eighteen years, and it is not unusual for a well-cared-for indoor cat to reach twenty. The breed differences are smaller than in dogs — a Siamese typically lives twelve to fifteen years, a Persian twelve to seventeen, a Maine Coon ten to thirteen, a Ragdoll twelve to seventeen — because cats do not vary in size the way dogs do. The biggest single factor is not breed but lifestyle: indoor cats typically live several years longer than outdoor cats. This estimator starts from the published lifespan range for your cat's breed and adjusts it for lifestyle and weight, always giving a range, never a single year, because individual cats vary widely and a range is the only honest way to talk about lifespan.

The indoor-outdoor difference is the most important fact on this page. Outdoor cats face traffic, predators, fights, infectious diseases such as feline leukaemia and feline immunodeficiency virus, and parasites — and the studies consistently find that they live several years less than indoor cats. An indoor cat with outdoor access (a catio, a secure garden, supervised walks) gets most of the benefit of indoor living with some of the enrichment of the outdoors. The estimator adds about a year for indoor living, which is a conservative figure — the real difference is often larger, but it depends on where the cat lives, and a rural outdoor cat faces different risks from an urban one.

What moves the number

Weight matters: an overweight cat is at higher risk of diabetes, arthritis and urinary problems, and loses years. Regular vet care matters, especially for kidney disease — the most common serious illness of older cats — which is much easier to manage when caught early through twice-yearly bloodwork from age seven. Dental care matters: dental disease is common in cats and is linked to kidney and heart problems. Neutering helps, mostly by reducing roaming and fighting. And breed matters a little: some breeds are famously long-lived, such as Siamese, Burmese and Russian Blues, while others, such as Persians and Maine Coons, tend to develop specific problems earlier — kidney disease in Persians, heart disease in Maine Coons — which is why the estimator shows the common health issues for your breed.

What the range means

A range of twelve to seventeen years means that most healthy cats of that breed, kept well, live into their teens — not that your cat will die at fourteen or fifteen. Some will live to twenty, some will be lost at ten to an illness or an accident, and neither outcome means anyone did anything wrong. The range is a planning tool: it tells you to expect a commitment of fifteen years or more when you take on a kitten, and to start senior care at around seven years old. It is also a reminder that the years are long but not infinite, and that the quality of those years — play, comfort, freedom from pain — matters as much as the count.

Common mistakes

The most common mistake is assuming an outdoor cat will live as long as an indoor one — the evidence says otherwise, consistently. The second is ignoring weight: a fat cat is not a healthy cat, and the extra years it loses are invisible until they are gone. The third is skipping vet visits because the cat "seems fine" — cats hide illness, and by the time a cat shows symptoms of kidney disease, it is often advanced. The fourth is treating the breed average as a guarantee for an individual cat. The fifth is forgetting that mixed-breed cats often live longest of all, because they benefit from a wider gene pool.

When to see a vet

Cats over seven should see a vet twice a year, with bloodwork, so that kidney disease and hyperthyroidism are caught early. See a vet promptly if your cat drinks more than usual, loses weight, eats less, vomits often, hides, or struggles to jump — all are early signs of the common diseases of older cats. For the human-year equivalent, use the cat age calculator; for the life stage, the cat years converter; and for how much your cat should eat at its age, the cat food calculator.