Home / Cat breed size chart / Maine Coon
Maine Coon size
The Maine Coon is the biggest of the popular cat breeds. Males usually weigh 12–22 lb (5.4–10 kg) and females 9–15 lb (4.1–6.8 kg), and they can take 3–5 years to reach full size. Enter your cat's weight to see how it compares.
You'll see where your cat sits in the usual Maine Coon range.
Breed ranges are a guide, not a target: a healthy body shape matters more than the number on the scale. Last reviewed October 9, 2026.
How big do Maine Coons get?
Breed registries and vet sources don't agree exactly, so here is what each one says about adult weight:
| Source | Males | Females |
|---|---|---|
| CFA | 20 lb or more is not unusual | smaller than males |
| TICA | 18–22 lb (average 13–18 lb) | 12–15 lb (average 9–13 lb) |
| VCA | up to 20 lb | up to about 12 lb |
| Purina | 12–15 lb | 9–12 lb |
Based on these figures, the size checker uses 12–22 lb (5.4–10 kg) for males and 9–15 lb (4.1–6.8 kg) for females. Ranges a source gives for all adults are shown for reference.
When do Maine Coons stop growing?
CFA says Maine Coons can take up to 3 years to reach full growth, TICA says they don't reach full size until 3–5 years, and VCA says they aren't fully mature until age 4. Maine Coons keep filling out after their first birthday, so a 1-year-old can still be well below its adult weight.
There is no published month-by-month growth chart for Maine Coon kittens from a breed registry or vet source, so we don't print one. For the first months, compare your kitten with the kitten growth chart, and use the kitten feeding chart to see how much to feed.
Maine Coon size facts
- VCA says a Maine Coon's body can stretch up to 40 inches (about 1 m) long.
- The longest domestic cat ever measured was Stewie, a Maine Coon, at 123 cm (48.5 in) in 2010, according to Guinness World Records.
Maine Coon size compared with other breeds
| Breed | Males | Females | Full size by |
|---|---|---|---|
| Savannah | 11–25 lb | same range | about 3 years |
| Maine Coon | 12–22 lb | 9–15 lb | 3–5 years |
| Ragdoll | 15–20 lb | 10–15 lb | about 4 years |
| Siberian | 12–20 lb | 8–12 lb | 3–5 years |
| Bengal | 9–18 lb | 6–12 lb | about 2 years |
| British Shorthair | 10–18 lb | 8–15 lb | 3–5 years |
| Norwegian Forest Cat | 10–18 lb | 8–12 lb | up to 5 years |
| Siamese | 8–15 lb | 5–12 lb | about 1 year* |
| Persian | 9–14 lb | 7–11 lb | about 1 year* |
| Sphynx | 8–12 lb | 6–10 lb | about 1 year* |
| Average house cat | 8–12 lb | about 1 year | |
Weights are the overall ranges from the breed sources on each page. *No breed-specific age given; most cats reach adult size at about 12 months. The average house cat weighs about 8–12 lb (PetMD).
Questions people ask
How big do Maine Coons get?
Males usually weigh 12–22 lb (5.4–10 kg) and females 9–15 lb (4.1–6.8 kg), and they can take 3–5 years to reach full size.
How much should a male Maine Coon weigh?
Sources give 12–22 lb (5.4–10 kg) for adult males. Your cat's body shape matters more than the number: use the cat weight calculator to check its body condition.
How much should a female Maine Coon weigh?
Sources give 9–15 lb (4.1–6.8 kg) for adult females. Females are usually smaller than males.
When is a Maine Coon full grown?
Maine Coons can take 3–5 years to reach full size, according to the breed sources above. Most of the growth happens in the first year.
Is my Maine Coon overweight?
Breed ranges are wide, so check body shape instead: you should be able to feel the ribs easily and see a waist from above. The cat weight calculator uses the 9-point body condition score to estimate your cat's ideal weight.
How much should I feed a Maine Coon?
Base it on your cat's ideal weight and activity, not the breed. The cat food calculator turns that into calories and cans or cups.
Sources
- CFA: Maine Coon
- TICA: Maine Coon
- VCA: Maine Coon
- Purina: Maine Coon
- Guinness World Records
- PetMD: Average weight of cats