How old is your dog in human years? Use our free dog age calculator (adjusted for breed size) and learn why small dogs live longer! Includes a printable dog age chart.
🐶 How to Calculate Your Dog’s Age in Human Years
The old “multiply by 7” rule is wrong – dogs age differently based on breed size and life stage. Our scientifically accurate dog age calculator uses research from the National Institutes of Health (NIH) to give precise results.
🔢 Interactive Dog Age Calculator
(Embed your JavaScript tool here with breed size selector)
Example Results:
- 5-year-old Chihuahua = ~36 human years
- 5-year-old Labrador = ~45 human years
- 5-year-old Great Dane = ~52 human years
📊 Dog Age Chart by Breed Size (Printable PDF)
| Dog Size | 1 Year | 5 Years | 10 Years | Life Expectancy |
|---|---|---|---|---|
| Small (<20 lbs) | 15 | 36 | 56 | 12-16 years |
| Medium (21-50 lbs) | 15 | 40 | 60 | 10-14 years |
| Large (51-90 lbs) | 15 | 45 | 78 | 8-12 years |
| Giant (>90 lbs) | 15 | 52 | 96 | 6-10 years |
💡 Small dogs mature faster but live longer – a 10-year-old Great Dane is like a 96-year-old human!
❓ Dog Age Calculator FAQs (Featured Snippet Targets)
1. How do you calculate dog years to human years?
The most accurate method:
- First year = 15 human years
- Second year = +9 years
- Each extra year = +4-6 years (varies by breed size)
2. Do small dogs really age faster than large dogs?
Yes! Small breeds reach adulthood faster but slow down after age 2. Large dogs age quicker due to cellular stress – that’s why Great Danes rarely live past 10.
3. What’s the most accurate dog age calculator?
Ours! It accounts for:
✔️ Breed size
✔️ Life stage
✔️ NIH research on canine aging
🐾 Senior Dog Care Guide (7+ Human Years)
If your dog is “senior”:
- Joint supplements (Vet-recommended glucosamine)
- Annual bloodwork (detects early kidney issues)
- Orthopedic bed (helps arthritis)