How a Maine Coon grows
Maine Coons are born at 100–150 g, slightly heavier than kittens of other breeds, and gain 100–150 g per week in the first month. By 3 months a kitten weighs about 2 kg; by 6 months a male reaches 4–6 kg and a female 3–4.5 kg. Growth is fastest in the first year, but Maine Coons reach full size only at 3–4 years: an adult male weighs 6–11 kg, a female 4.5–7.5 kg.
Weight is not the point — size is
The Maine Coon is one of the largest domestic breeds, but heavy weight alone is not a sign of quality. Cats are often overfed: a smaller cat may weigh more than others while looking noticeably smaller. That is most likely obesity and calls for a vet visit. Judge the proportions: a healthy Maine Coon has a visible waist, and the ribs can be felt under muscle, not fat.
What affects a kitten’s weight
Sex (males are noticeably bigger), the parents’ genetics, litter size, diet quality and health. Kittens from large litters may start smaller but usually catch up by one year. Feed a Maine Coon or large-breed kitten food and weigh the kitten weekly in the first months to spot deviations early.
FAQ
How much does an adult Maine Coon weigh?
Males 6–11 kg, females 4.5–7.5 kg. The breed reaches full size at 3–4 years.
How much should a Maine Coon weigh at 3 months?
Males 1.8–2.3 kg, females 1.6–2.3 kg. These are approximate averages.
How much does a Maine Coon weigh at 6 months?
Males 3.9–6 kg, females 3.2–4.5 kg.
My cat weighs more than the chart — is that bad?
Not necessarily: the values are approximate. But if the cat looks small while the weight is high, have a vet check for obesity.