Dog years to human years chart
The figures below use a familiar life-stage model: about 15 human years for year one, 24 by year two, then a size-based amount for each later year. Values are rounded estimates.
| Dog age | Small | Medium | Large | Giant |
|---|---|---|---|---|
| 1 year | 15 | 15 | 15 | 15 |
| 2 years | 24 | 24 | 24 | 24 |
| 3 years | 28 | 29 | 30 | 31 |
| 5 years | 36 | 39 | 42 | 45 |
| 7 years | 44 | 49 | 54 | 59 |
| 10 years | 56 | 64 | 72 | 80 |
| 12 years | 64 | 74 | 84 | 94 |
| 15 years | 76 | 89 | 102 | 115 |
How to read the dog age chart
Choose the row for your dog's completed calendar years and the column closest to its expected adult size. Small means under roughly 10 kg, medium 10–25 kg, large 25–40 kg and giant over 40 kg. If your dog is between birthdays, use the dog age calculator to include additional months.
The chart accelerates later ageing for larger dogs. It does not claim that every dog follows the same path: breed and individual health can matter as much as weight.
What a dog age chart cannot tell you
Human-year comparisons are an easy way to describe a life stage, not a veterinary standard. They do not diagnose age-related changes or decide when a dog needs screening. Ask your vet for advice tailored to breed, health history and behaviour.
Keep the exact age up to date
LifeDates turns a birth date into a living pet timeline. Add your dog's name, date and photograph to see exact calendar age, the next birthday, days alive and supported animal-age estimates. You can set birthday and milestone reminders or save adoption day as an Important Date.
If a rescue dog's birthday is unknown, use the best estimate supplied by your rescue or vet and add a note so you remember that the date is approximate.
A chart for now. A timeline for every day.
Download LifeDates free to track your dog's exact age and next milestones.
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