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Cat Calculators

Four free tools for cat owners, built on named veterinary and breed-registry sources and written for big cats like the Maine Coon.

  • Free, no sign-up
  • Every number sourced and dated
  • Runs in your browser

The calculators

Cat Age CalculatorCat years to human years, with the AAHA/AAFP life stage and two published conversion tables side by side.Is My Cat Overweight?Check ribs, waist and belly against the 9-point body condition chart. Built for big-framed cats like the Maine Coon.Cat Calorie & Feeding CalculatorDaily calories from AAHA’s energy formula, turned into cups of dry or cans of wet food, plus the water your cat needs.Is My Cat a Maine Coon?Tick the traits you can see and compare them with the CFA breed standard.

What the sources say

Six findings that came out of building the tools. Each links to the calculator where you can try it.

56 vs 53A 10-year-old cat is 56 human years on International Cat Care’s table and 53 on Cornell’s. The two published tables start 3 years apart at age 2.Cat age calculator →1.2 to 1.4AAHA’s 2021 guidelines feed a neutered adult cat at 1.2 to 1.4 times its resting energy, and a cat on a weight-loss plan at 0.8 times.Cat feeding calculator →75% vs 6-10%Cornell’s Feline Health Center says canned cat food is at least 75 percent water and dry food six to 10 percent.Cat feeding calculator →5 of 9A score of 5 on the 9-point body condition chart is the target: ribs felt under a slight layer of fat, a waist behind the ribs, little belly fat.Body condition checker →3 yearsThe Cat Fanciers’ Association says a Maine Coon is slow-maturing and can take up to three years to reach full growth.Maine Coon checklist →60 of 100On the CFA’s 100-point Maine Coon standard, head and body are worth 30 points each, so shape outweighs coat (20) and color (15).Maine Coon checklist →

How we build these tools

Named sources only

Every number comes from a source we read and name on the page with the date: AAHA, AAFP, Cornell, International Cat Care and the Cat Fanciers’ Association.

Disagreements shown

Where two sources differ, as with cat-to-human age, the tool shows both instead of picking one.

Limits stated

When a tool cannot know something, such as an ideal weight by age for Maine Coons, the page says so.

Private

The calculations run in your browser. Nothing you type is sent to us.

Cite this page

Maine Coon Guides, “Cat Calculators”, mainecoonguides.com/cat-calculators/, 2026.

General information, not veterinary advice.