Dog Life Expectancy Calculator

Estimate a dog's life expectancy by size.

Average life expectancy (years) 12

Estimated remaining (years) 7

Formula: by size; remaining = expectancy − current age

Step-by-step with your numbers:

1. Values used:

2. Size category = 12

3. Current age = 5 years

5. Average life expectancy = 12years

6. Estimated remaining = Size category - Current age = 12 - 5 = 7years

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Larger dogs generally live shorter lives than smaller ones.

The math behind it

Average lifespan drops with size: small ~14, medium ~12, large ~10, giant ~8 years.

A 5-year-old medium dog → ~7 years remaining.

Breed matters?

Yes — these are size averages; specific breeds vary.