Cat calculators
Estimate cat age in human years and daily calories by life stage. Example: a 10 lb (4.5 kg) neutered adult often needs about 200–250 kcal/day before treats. Each calculator shows its method and sources; results are educational—confirm care with your veterinarian.
Cat tools
Cat Age Calculator
Estimate your cat’s age in human years with life-stage stages used by veterinary associations.
Cat Food Calculator
Estimate daily kcal and feeding amounts for cats by weight, life stage, and body condition goals.
Cats are obligate carnivores with different calorie and protein needs than dogs. Indoor neutered adults often gain weight on ad lib feeding, while kittens need frequent meals and higher MER multipliers. Our cat food calculator starts from the same RER formula used in veterinary nutrition (70 × kg0.75) and applies life-stage factors from WSAVA-style teaching charts. The cat age calculator converts calendar age to human years and names the life stage so you can align vet visits and diet changes.
For deeper feeding context—wet versus dry, meal frequency, and weight goals—read the cat feeding guide. New cat owners can map age bands with the cat life stages guide (kitten through senior) and set meal frequency with the kitten feeding schedule. If you also care for dogs, visit the dog calculators hub or the full tool directory. See our editorial policy.
Related guides
The Dog Years Myth: Why 7:1 Is Wrong
Why the 7:1 dog-years myth fails, what AAHA life stages mean, and how the Wang et al. 2020 log curve (104 Labradors) compares.
Cat Feeding Guide: Calories, Wet vs Dry, and Weight
Cat feeding by life stage: wet vs dry, meal schedules, weight cues, and when to use a cat food calculator for kcal estimates.
Cat Life Stages: Kitten to Geriatric
AAFP/AAHA-style cat life stages with a cat-years-to-human-years chart, care focus by age, and when to adjust diet or vet visits.
Kitten Feeding Schedule by Age
Kitten feeding schedule by age: meals per day, weaning notes, calorie multipliers, and when orphan or underweight kittens need a vet.