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Pet Age Calculator - Dog & Cat Years

Free pet age calculator. Convert dog years and cat years to human years. Accurate calculations based on pet size and species.

Convert pet age to human years

Enter your values to see results

and click the "Calculate" button

Pet Age Calculator

Calculate your pet's age in human years. Dogs age faster in early years, then slow down. Size affects dog aging rate.

Dogs: 15 (yr 1) + 9 (yr 2) + 4-5 per year after. Cats: 15 + 9 + 4/year

The old '7 years' rule is inaccurate. Pets mature quickly, then age more slowly. Large dogs age faster than small.

Why do large dogs age faster?

Larger dogs have shorter lifespans (8-10 years) vs small dogs (12-16 years). Their bodies work harder, aging faster.

When is a pet considered senior?

Dogs: 7+ years (5+ for large breeds). Cats: 11+ years. Senior pets need more vet checkups and adjusted nutrition.

Age Calculator

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