Maine Coon Weight Chart by Age
Track your Maine Coon kitten's growth against global breed standards.
Save the growth curve
Want to track growth over time and receive medical alerts when weight drops?
| Age | Male avg | Female avg |
|---|---|---|
| Birth | 130 g | 130 g |
| 1 Week | 225 g | 225 g |
| 4 Weeks | 505 g | 505 g |
| 8 Weeks | 1250 g | 1250 g |
| 12 Weeks | 1950 g | 1950 g |
How fast should a Maine Coon kitten grow?
Maine Coon kittens are among the fastest-growing cat breeds. They double their birth weight in the first week and continue growing for 4–5 years. A healthy kitten should gain weight consistently every week — stagnation for more than 2 days is a warning sign.
When do Maine Coon cats stop growing?
Maine Coon cats typically grow for 48 months before reaching their full adult weight.
Red flags: When to worry
- Weight loss of more than 10% of body weight
- No weight gain for 48 hours (newborns)
- Shrinking belly or kitten appears bloated
- Kitten not nursing or not seeking the mother
Maine Coon weight: frequently asked questions
- How much should a newborn Maine Coon kitten weigh?
- A healthy newborn Maine Coon kitten typically weighs between 90 g and 170 g. Weigh every kitten on the same scale at the same time each day for the first two weeks — steady daily gain matters more than the absolute number.
- How much should an 8-week-old Maine Coon weigh?
- At 8 weeks most Maine Coon kittens weigh roughly 900–1600 g. The interactive chart above plots the full healthy band so you can see exactly where one kitten falls.
- How much should a 12-week-old Maine Coon weigh?
- By 12 weeks a Maine Coon kitten is usually around 1500–2400 g, with males trending toward the upper end of the range and females toward the lower end.
- When does a Maine Coon stop growing?
- A Maine Coon reaches its full adult size at about 4 years (roughly 48 months). Most visible weight gain happens in the first 12 weeks, then growth continues more slowly toward the adult frame.
- How do I track my Maine Coon kitten's growth?
- Enter a current weight in the tool above to plot it against the breed curve. To follow every weigh-in over time, felineStudio is cattery software that charts each kitten's growth, flags slow gainers automatically and keeps the full health record per cat.