Biology
Convert a dog's age into human years using the published epigenetic-clock formula.
Your inputs
Change any value — everything updates instantly.
Formula applies from age 1.
Try an example
Human-equivalent age
57 years
This means a 5-year-old dog is roughly like a 57-year-old person.
What you are seeing
Each bar grows to show a result for your inputs.
The top bar is the main answer: 57 years.
Change dog's age (now 5) and the bars update instantly.
Result explanation: Human-equivalent age
57 years.
Real-life comparison: With dog's age 10% higher, the answer would be 58.28.
Low, normal or high? Use this as an estimate based on the stated formula.
How the result changes with dog's age
How to read this chart: The line shows the result across a range of values. The dot marks your input.
Convert a dog's age into human years using the published epigenetic-clock formula.
This means a 5-year-old dog is roughly like a 57-year-old person.
Population average from one breed study.
Derived from DNA methylation changes in Labrador retrievers.
human age = 16 × ln(dog age) + 31
Symbols
Why this formula works
Derived from DNA methylation changes in Labrador retrievers.
Unit check
Units match on both sides ✓
Worked example
Common mistakes
This means a 5-year-old dog is roughly like a 57-year-old person.
Yes — dogs age fast early, then slower.
Yes; the study used Labradors and large breeds age faster.
The log formula is not meaningful there.
No, it is a population average.
Reviewed 2026-09-25 · Next review 2027-09-25
Important limitation. Population average from one breed study.
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
Benadryl Dosage for Dogs Calculator
Educational estimate of a label-range diphenhydramine amount by body weight. Always confirm with a veterinarian.
Cephalexin for Dogs Dosage Calculator
Educational estimate of a label-range cephalexin amount by body weight. Always confirm with a veterinarian.
Cost of Owning a Dog Calculator
Add up food, vet, grooming, insurance and other costs to see yearly and lifetime spending.
Dog Calorie Calculator
Estimate daily calories from resting energy need and a life-stage factor.
Dog Chocolate Toxicity Calculator
Estimate the theobromine dose from chocolate eaten, compared with published toxic thresholds.
Dog Crate Size Calculator
Find crate length and height from your dog's measurements.
