Enter your Maine Coon's current weight, sex, and age to see if they are within the healthy weight range and view a full growth chart.
FAQs
Maine Coons are the largest domestic cat breed. Adult males typically weigh 13–18 lbs (6–8 kg) and females 8–12 lbs (3.6–5.4 kg). Some exceptional males reach 20+ lbs. They are large-boned and muscular, not just heavy.
Maine Coons grow much slower than most cats. They reach full physical maturity at 3–5 years of age, compared to 1 year for most breeds. Do not be alarmed if your Maine Coon is still growing at 2 years old — this is normal.
Maine Coons can look very large but still be a healthy weight due to their frame and dense coat. Feel your cat's ribs — you should be able to feel them with light pressure but not see them. Consult your vet for a body condition score assessment.
Maine Coons have higher caloric needs than average cats due to their size. Use our Maine Coon Food Calculator to get personalised feeding recommendations based on their age, weight, and activity level.
Maine Coons are naturally slow-growing — this is part of their genetics and is perfectly normal. They gain weight steadily but won't hit the big numbers until 18–36 months. Ensure they are eating a high-quality kitten or all-life-stages food during growth.
Yes, significantly. Males are substantially larger than females, averaging 13–18 lbs vs 8–12 lbs for females. This sexual dimorphism is more pronounced in Maine Coons than in most other breeds. Always compare your cat's weight to same-sex ranges.
The table below shows healthy weight ranges for Maine Coon cats at each age stage, split by sex. Maine Coons grow unusually slowly — full adult size is not reached until 3–5 years.
| Age | Min (lbs) | Avg (lbs) | Max (lbs) |
|---|---|---|---|
| 3 months | 3.0 | 3.8 | 4.5 |
| 4 months | 4.0 | 5.0 | 6.0 |
| 5 months | 5.0 | 6.2 | 7.5 |
| 6 months | 6.0 | 7.5 | 9.0 |
| 9 months | 8.0 | 10.0 | 12.0 |
| 12 months (1 year) | 10.0 | 12.0 | 14.0 |
| 18 months | 11.0 | 13.5 | 16.0 |
| 24 months (2 years) | 12.0 | 14.5 | 17.0 |
| 3–5 years (fully grown) | 13.0 | 15.5 | 18.0 |
| Age | Min (lbs) | Avg (lbs) | Max (lbs) |
|---|---|---|---|
| 3 months | 2.5 | 3.2 | 4.0 |
| 4 months | 3.5 | 4.2 | 5.0 |
| 5 months | 4.5 | 5.5 | 6.5 |
| 6 months | 5.0 | 6.2 | 7.5 |
| 9 months | 6.5 | 8.0 | 9.5 |
| 12 months (1 year) | 7.5 | 9.0 | 11.0 |
| 18 months | 8.0 | 10.0 | 12.0 |
| 24 months (2 years) | 8.0 | 10.0 | 12.0 |
| 3–5 years (fully grown) | 8.0 | 10.0 | 12.0 |
Weight ranges are guidelines based on breed standards. Individual cats may fall slightly outside these ranges and still be healthy. Use the weight calculator above to assess your cat's specific situation.
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