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How to Calculate Dog Life Expectancy

What is Dog Life Expectancy?

Dog life expectancy varies significantly by size and breed. Smaller dogs generally live longer than larger dogs — a pattern opposite to most other mammals. Giant breeds may only live 6–8 years, while toy breeds commonly reach 14–16 years.

Step-by-Step Guide

  1. 1Toy breeds (< 5kg): average lifespan 12–16 years
  2. 2Small breeds (5–10kg): average 10–15 years
  3. 3Medium breeds (10–25kg): average 10–13 years
  4. 4Large breeds (25–45kg): average 8–12 years
  5. 5Giant breeds (45kg+): average 6–10 years

Worked Examples

Input
Chihuahua (toy)
Result
12–20 years
Some reach 20+ years
Input
Labrador (large)
Result
10–12 years
Most common family dog
Input
Great Dane (giant)
Result
7–10 years
Largest breeds age fastest

Frequently Asked Questions

What is Dog Life Expectancy?

Dog life expectancy varies significantly by size and breed. Smaller dogs generally live longer than larger dogs — a pattern opposite to most other mammals

How accurate is the Dog Life Expectancy calculator?

The calculator uses the standard published formula for dog life expectancy. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Dog Life Expectancy calculator use?

This calculator works with kilograms. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Dog Life Expectancy calculator use?

The calculator applies the standard formula for this type of calculation. See the 'How It Works' steps above for the detailed formula breakdown.

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