Dog Years Calculator

Convert your dog's age to human years using the latest scientific formula.

Calculator

Enter Dog's Age

Enter your dog's age in years (can include decimals).

Select your dog's size category.

Table of Contents

1 How to Calculate
2 Age Formula
3 Dog Life Stages
Steps

How to Calculate

To calculate your dog's age in human years, follow these steps:

  1. 1
    Enter your dog's age in years
  2. 2
    Select your dog's size category
  3. 3
    Get the equivalent human age
Formula

Age Formula

The formula for calculating dog years varies by size:

Size-Based Formulas:
Small Dogs: 16 × ln(dog_age) + 31
Medium Dogs: 15.6 × ln(dog_age) + 31
Large Dogs: 15.2 × ln(dog_age) + 31
Stages

Dog Life Stages

Puppy 0-1 Year

Rapid growth and development

Equivalent to 0-15 human years

Key milestones: walking, teething, socialization

Adult 1-7 Years

Prime of life

Equivalent to 15-50 human years

Key characteristics: full energy, stable behavior

Senior 7+ Years

Golden years

Equivalent to 50+ human years

Key changes: slower activity, health monitoring needed

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