Maine Coon Age Calculator
A 1-year-old Maine Coon is about 15 in human years and a 12-year-old about 64. Maine Coons typically live 12 to 15 years, or 64 to 76 in human terms.
In human years
28
A 3-year-old cat is about 28 in human years.
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How the Maine Coon ages
The Maine Coon weighs about 10β25 lb and typically lives 12β15 years. Like all cats, it ages fast early: about 15 human years by age one and 24 by age two, then roughly four human years for every calendar year after that. A 5-year-old is around 36 in human years, and a 12-year-old about 64. This feline curve reflects how cats really age, unlike the flat "multiply by seven" rule that overstates a kitten's age and understates a senior cat's.
How long do Maine Coons live?
A Maine Coon typically lives 12 to 15 years. On the feline curve that is 64 to 76 in human years. Vets count a cat as senior from about age 10, so a Maine Coon that reaches a typical lifespan spends 2 to 5 years as a senior, which is when twice-yearly checkups start to earn their cost.
The Maine Coon is the largest common domestic breed and the slowest to finish growing: many keep filling out until four or five. Its age in human years follows the same feline curve as any cat, but its body is still maturing well into what the curve calls young adulthood.
Maine Coon life stages, year by year
Life stages follow the AAHA/AAFP feline life stage guidelines: kitten to 1, young adult 1 to 6, mature adult 7 to 10, senior from 10. The rows run to the top of the Maine Coon's usual lifespan. A Maine Coon reaches its full adult size at 3 to 5 years.
| Maine Coon age | Human years | Life stage |
|---|---|---|
| 1 | 15 | Young adult |
| 2 | 24 | Young adult |
| 3 | 28 | Young adult |
| 4 | 32 | Young adult |
| 6 | 40 | Young adult |
| 8 | 48 | Mature adult |
| 10 | 56 | Senior |
| 12 | 64 | Senior |
| 14 | 72 | Senior |
What shapes a Maine Coon's senior years
Breed does not change how fast a cat ages, but it does change what tends to go wrong on the way. These are the conditions with a recognised link to the Maine Coon:
- Hypertrophic cardiomyopathy (HCM): a Maine Coon-specific MYBPC3 mutation is linked to the disease and has a DNA test; echocardiogram screening is still recommended.
- Hip dysplasia: far more common than in most cats, partly because of the breed's size.
- Spinal muscular atrophy: an inherited neuromuscular disease with a DNA test.
How much a Maine Coon eats
Daily calories across the breed's adult weight range (10β25 lb), from the resting energy formula (70 Γ kg0.75) times the feline life-stage factor. Cups assume a 400 kcal/cup dry food. The breed's 10 to 25 lb range covers small females to big males, and 25 lb describes a large male at a healthy weight, not a target. Feed a growing Maine Coon on kitten food for longer than other breeds, then recalculate for adult needs once it has stopped growing.
| Weight | Neutered adult | Intact adult | Senior | Cups/day |
|---|---|---|---|---|
| 10 lb | 261 kcal | 305 kcal | 250 kcal | 0.65 |
| 17.5 lb | 397 kcal | 463 kcal | 381 kcal | 0.99 |
| 25 lb | 519 kcal | 606 kcal | 497 kcal | 1.3 |
A general estimate, not veterinary advice. The cat calorie guide shows the method and how to feed an overweight cat down safely.
Other cat breeds
Every cat runs the same feline curve; what changes is adult weight and how long they usually live.
- Persian7β12 lb, lives 10β17 yrs
- Ragdoll10β20 lb, lives 12β17 yrs
- Russian Blue7β12 lb, lives 15β20 yrs
- Scottish Fold6β13 lb, lives 11β15 yrs
- Siamese8β15 lb, lives 12β20 yrs
- Sphynx6β12 lb, lives 8β14 yrs
More for cat owners
- How many litter boxes you actually needThe n+1 rule, and where to put them
- Cat food portion calculatorDaily calories and cups by weight and life stage
- How many calories a Maine Coon needsCat calories by weight, wet and dry
- How much to feed a kittenCalories and meals per day by age
Frequently asked questions
How old is my Maine Coon in human years?
Enter your Maine Coon's age above. As a guide, a cat is about 15 at 1 year, 24 at 2, and 48 by age 8.
How long do Maine Coons live?
Maine Coons typically live 12 to 15 years, which is 64 to 76 in human years on the feline curve. The main conditions to ask a breeder or vet about are hypertrophic cardiomyopathy (HCM) and hip dysplasia. Indoor cats kept lean reach the upper end of the range more often.
When is a Maine Coon fully grown?
At 3 to 5 years. The human-years curve does not change with that: a 1-year-old Maine Coon is about 15 in human years like any cat, even if it is still filling out.
How many calories does a Maine Coon need?
A neutered adult Maine Coon needs about 261 kcal a day at 10 lb and 519 kcal at 25 lb, or 0.65 to 1.3 cups of a 400 kcal/cup dry food. The breed's 10 to 25 lb range covers small females to big males, and 25 lb describes a large male at a healthy weight, not a target.
Keep going with the same pet
See how much to feed your Maine Coon next. The food calculator picks up the same saved pet.
Your dog's age in human years, breed-size adjusted, not the Γ7 myth.
How much to feed: daily calories and cups by weight, activity and life stage.
Tank gallons and liters from your dimensions: rectangle, cylinder, hex and more.
Bioload-based stocking guidance, not the oversimplified 1-inch-per-gallon rule.