Cat Age Calculator: Convert Cat Years to Human Years
Convert your cat's age to human years with our calculator based on feline development stages and veterinary guidelines.
Loading calculator...
Convert your cat's age to human years with our calculator based on feline development stages and veterinary guidelines.
Loading calculator...
| Cat Years | Human Years |
|---|---|
| 0.5 | 8 |
| 1 | 15 |
| 2 | 24 |
| 3 | 28 |
| 5 | 36 |
| 8 | 48 |
| 12 | 64 |
| 16 | 80 |
Our enhanced calculator compares your cat's weight to breed-specific ideal weights to assess health risks. Use the toggle button in the weight input field to switch between pounds (lbs) and kilograms (kg):
This approach accounts for natural breed differences - a 12 lb Maine Coon is healthy while a 12 lb Siamese may be overweight.
Enter your cat's age in years (you can use decimals like 7.5 for 7 years and 6 months)
Select your cat's breed for more accurate life expectancy calculations and breed-specific health insights
Enter your cat's current weight and use the toggle button to switch between pounds and kilograms
Select your cat's lifestyle from the dropdown menu (indoor, outdoor, or mixed)
Select your cat's activity level for exercise recommendations and health risk assessment
View the calculated human age equivalent, life stage, health indicators, care recommendations, and detailed health risk assessment
| Life Stage | Vet Visits | Vaccinations | Screenings |
|---|---|---|---|
| Kitten | Every 3-4 weeks until 16 weeks | Core vaccines at 6-8, 10-12, 14-16 weeks | Fecal exams, deworming |
| Adult | Twice yearly | Annual boosters | Annual exams, dental checks |
| Senior | Every 6 months | As needed based on health | Blood work, urinalysis, thyroid screening |
| Geriatric | Every 3-4 months | As needed based on health | Comprehensive panels, regular monitoring |
Tip: Mental stimulation through puzzle toys, gentle training, and maintaining routines can help support cognitive health in aging cats.
The estimated age of your cat if they were human, calculated using the standard feline development formula (15+9+4 pattern)
Your cat's current life stage with detailed age ranges (Kitten, Young Adult, Adult, Mature Adult, Senior, or Geriatric)
General guidance on what to expect and how to care for your cat at this life stage
Expected lifespan range based on your cat's lifestyle, with breed-specific adjustments
Common physical and behavioral signs to watch for at your cat's life stage
Dietary recommendations appropriate for your cat's age and life stage
Activity recommendations to maintain physical and mental health
Evaluation of potential health risks based on weight and breed-specific ideal weights. Provides detailed explanation of what your cat's weight means for their health and specific recommendations.
Convert cat years to a human‑readable equivalent and see life‑stage guidance. Lifestyle context helps set expectations.
Convert cat years to a human‑friendly number using the common 15 + 9 + 4 approach. See which stage your cat is in and what that often means day‑to‑day.
First year ≈ 15 years, second ≈ 9, then ~4 per year.
Kitten/young, adult, mature, senior and geriatric.
Short, sensible tips that match each stage.
Important: This cat age calculator is designed for educational and general pet care awareness purposes using established feline aging research and life stage classifications. While calculations are based on veterinary studies and typical feline development patterns, individual cats age differently based on breed, genetics, health status, diet, indoor/outdoor lifestyle, medical history, and environmental factors that cannot be captured by generalized age conversion formulas. Age equivalencies are approximations and should not be used for medical decisions, treatment planning, or health assessments. For accurate health evaluations, vaccination schedules, dietary recommendations, behavioral assessments, or any medical concerns about your cat, always consult with a qualified veterinarian who can assess your cat's individual needs, health status, and life stage requirements.
Share this calculator or embed it on your website