Cat Age Calculator
Convert cat age to human years and human age to cat years
Conversion Mode
Choose conversion direction
Enter Age
Enter cat's age in years
Average cat lifespan: 12-18 years
Cat Life Stages
Kitten
Cat: 0-1 years ≈ Human: 0-15 years
Young Adult
Cat: 1-3 years ≈ Human: 15-28 years
Mature Adult
Cat: 3-7 years ≈ Human: 28-44 years
Senior
Cat: 7-11 years ≈ Human: 44-60 years
Geriatric
Cat: 11+ years ≈ Human: 60+ years
Conversion Formula
Year 1:
1 cat year = 15 human years
Year 2:
2 cat years = 24 human years
Year 3+:
Each additional cat year = 4 human years
Age Conversion Result
Cat age in human years
Cat Age
3 years
↓
Human Equivalent
28
human years
Life Stage
Current Life Stage
Mature Adult
Age Comparison Chart
Cat Age
Human Age
6 months
10 years
1 year
15 years
2 years
24 years
3 years
28 years
5 years
36 years
7 years
44 years
10 years
56 years
12 years
64 years
15 years
76 years
18 years
88 years
20 years
96 years
Age-Related Care Tips
Adult Care:
Regular exercise, balanced diet, annual vet checkups, dental care
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About Cat Age Calculator
How Cat Age Conversion Works
Cats age much faster than humans, especially in their first two years of life. The commonly used conversion method accounts for rapid development in early years: the first year equals about 15 human years, the second year adds 9 more (totaling 24), and each subsequent year adds approximately 4 human years.
Cat Life Stages
- Kitten (0-1 year): Rapid growth and development phase
- Young Adult (1-3 years): Peak physical condition and energy
- Mature Adult (3-7 years): Stable, established behavior patterns
- Senior (7-11 years): May show signs of aging, slower metabolism
- Geriatric (11+ years): Increased health monitoring needed
Factors Affecting Cat Aging
- Breed: Some breeds live longer than others
- Indoor vs Outdoor: Indoor cats typically live longer (12-18 years vs 2-5 years)
- Diet: Quality nutrition impacts longevity
- Healthcare: Regular vet visits and preventive care
- Genetics: Inherited health conditions affect lifespan
- Lifestyle: Exercise, stress levels, and environment
Signs of Aging in Cats
- Decreased activity and playfulness
- Changes in sleep patterns (sleeping more)
- Weight changes (gain or loss)
- Dental issues and bad breath
- Cloudy eyes or vision changes
- Arthritis and reduced mobility
- Changes in grooming habits
- Cognitive changes (confusion, disorientation)
Longest-Living Cats
The oldest cat on record was Creme Puff, who lived to 38 years and 3 days (equivalent to about 168 human years!). While exceptional, many cats can live into their late teens or early twenties with proper care.
Important Notes
- This calculator provides approximate conversions based on general guidelines
- Individual cats may age differently based on various factors
- Consult your veterinarian for personalized health assessments
- Regular vet checkups become more important as cats age
- Senior cats (7+) should see a vet at least twice yearly