Dog Year Calculator
Convert human years to dog years based on your dog's size. More accurate than the 7-year rule.
Quick Reference Table
| Dog Age | Small | Medium | Large | Giant |
|---|---|---|---|---|
| 1 yr | 15 | 15 | 15 | 15 |
| 2 yr | 25 | 24 | 24 | 24 |
| 3 yr | 29 | 29 | 30 | 31 |
| 5 yr | 37 | 39 | 42 | 45 |
| 7 yr | 45 | 49 | 54 | 59 |
| 10 yr | 57 | 64 | 72 | 80 |
| 13 yr | 69 | 79 | 90 | 101 |
| 15 yr | 77 | 89 | 102 | 115 |
About Dog Years
The old 7:1 rule is inaccurate. Dogs age faster in their first two years and the rate varies by size. Small dogs tend to live longer than large dogs.
How We Calculate
- Year 1: About 15 human years
- Year 2: About 9 human years
- Years 3+: 4-7 years depending on size
Features
- Size-adjusted calculation
- More accurate than 7x rule
- 4 size categories
- 100% client-side
Some links on this page are affiliate links. If you click and make a purchase, we may earn a commission at no extra cost to you.
Disclaimer:This tool is provided “as is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser — we do not store, transmit, or access your data. Use at your own risk.