Interactive • Size-aware
Pet Age Calculator - Size-Aware Dog & Cat Years Converter
Explore how pet years convert to human years. Toggle dog sizes (small, medium, large, giant) or switch to cats, then hover the chart to see exact values.
Quick reference table (selected profile)
Currently showing: Dog — all sizes. Switch species or toggle series above to update.
| Pet years | Small dog | Medium dog | Large dog | Giant dog |
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Dog & Cat Age Chart — FAQs
How do dog years convert to human years on this chart?
The first year ≈15 human years, the second ≈9, and additional years vary by dog size (small ≈4, medium ≈5, large ≈6, giant ≈7). Use the chart above or the Pet Age Calculator for an instant estimate.
Is the dog age chart accurate for all breeds?
It’s a helpful estimate, not medical advice. Giant breeds age faster than toy breeds, and individual health matters. Ask your veterinarian for breed-specific guidance.
How do cat years convert to human years?
For cats, year 1 ≈15 human years, year 2 ≈9, and each year after ≈4. Toggle to “Cat” above to view the feline curve.