Dog Age Calculator – How Old Is Your Dog in Human Years?
Ever wondered how old your dog really is in human terms? Our dog age calculator converts your dog’s age using the latest science — which goes far beyond the old “multiply by 7” myth.
Dog Age Calculator
Dog Age to Human Age Chart
| Dog Age | Small Dog | Medium Dog | Large Dog |
|---|---|---|---|
| 1 year | 15 | 15 | 15 |
| 3 years | 28 | 28 | 28 |
| 5 years | 36 | 36 | 36 |
| 8 years | 48 | 51 | 55 |
| 10 years | 56 | 60 | 66 |
| 15 years | 76 | 83 | 93 |
Frequently Asked Questions
Is the 7-year rule accurate?
No. The "multiply by 7" rule is a myth. Dogs age very rapidly in the first two years, then slow down. A 1-year-old dog is roughly equivalent to a 15-year-old human.
Why do larger dogs age faster?
Larger breeds have accelerated cellular aging — they grow faster and their bodies experience more wear. A 10-year-old Great Dane is far older in human terms than a 10-year-old Chihuahua.
When is a dog considered a senior?
Small breeds are considered senior at 10–12 years. Medium breeds at 8–10 years. Large and giant breeds at 6–8 years.