Human years to cat years
Type a value in human yrs to get it in cat yrs instantly.
Nothing on our list is smaller: a teenager is 3× older. Based on veterinary tables, not the old "times seven" rule.
Convert the other way: cat yrs to human yrs
What it means
How old is that really?
Based on the standard veterinary tables: 15 human years for the first year, 9 for the second, then a rate that depends on size.
The math
How to convert human yrs to cat yrs
Not a simple multiplication: the first year counts 15 human years, the second adds 9, and each year after adds 4.5 to 7.5 depending on the dog’s size.
Example: 5 human yrs = 0.333333 cat yrs.
The table below is for this size: Small dog (under 10 kg).
Every unit
Your pet’s age every way
Tables
human yrs to cat yrs conversion table
| human yrs | cat yrs |
|---|---|
| 0.5 human yrs | 0.0333333 cat yrs |
| 1 human yrs | 0.0666667 cat yrs |
| 1.5 human yrs | 0.1 cat yrs |
| 2 human yrs | 0.133333 cat yrs |
| 3 human yrs | 0.2 cat yrs |
| 4 human yrs | 0.266667 cat yrs |
| 5 human yrs | 0.333333 cat yrs |
| 6 human yrs | 0.4 cat yrs |
| 7 human yrs | 0.466667 cat yrs |
| 8 human yrs | 0.533333 cat yrs |
| 10 human yrs | 0.666667 cat yrs |
| 12 human yrs | 0.8 cat yrs |
| 15 human yrs | 1 cat yrs |
| 18 human yrs | 1.33333 cat yrs |
cat yrs to human yrs conversion table
| cat yrs | human yrs |
|---|---|
| 0.5 cat yrs | 7.5 human yrs |
| 1 cat yrs | 15 human yrs |
| 1.5 cat yrs | 19.5 human yrs |
| 2 cat yrs | 24 human yrs |
| 3 cat yrs | 28 human yrs |
| 4 cat yrs | 32 human yrs |
| 5 cat yrs | 36 human yrs |
| 6 cat yrs | 40 human yrs |
| 7 cat yrs | 44 human yrs |
| 8 cat yrs | 48 human yrs |
| 10 cat yrs | 56 human yrs |
| 12 cat yrs | 64 human yrs |
| 15 cat yrs | 76 human yrs |
| 18 cat yrs | 88 human yrs |
Quick answers
Quick answers
- How many cat yrs is 1 human yrs?
- 1 human yrs is 0.0666667 cat yrs.
- How many cat yrs is 10 human yrs?
- 10 human yrs is 0.666667 cat yrs.
- How many cat yrs is 5 human yrs?
- 5 human yrs is 0.333333 cat yrs.
The units
About these units
Human years (human yrs)
The human-equivalent age, the number people actually want.
Cat years (cat yrs)
A cat’s actual age. Cats age more evenly than dogs after year two.
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