🐶 Blog · 2026-04-27
Pet Age in Human Years — The Correct Formula (2026)
The "dog × 7" formula is wrong. Here is the 2026 correct conversion by breed size and species, plus stage-by-stage care notes.
"Dog × 7" is a 1950s myth
A 2020 joint study by AVMA and the UK Kennel Club confirmed dog aging is non-linear — fastest in the first 1–2 years, then slowing.
Correct conversion — by dog size
Small (≤10kg — Dachshund, Maltese, Pomeranian)
| Dog age | Human age |
|---|---|
| 1 | 15 |
| 2 | 24 |
| 5 | 36 |
| 10 | 56 |
| 15 | 76 |
| 20 | 96 |
Medium (10–25kg — Beagle, Cocker, Shiba)
| Dog age | Human age |
|---|---|
| 1 | 15 |
| 2 | 24 |
| 5 | 38 |
| 10 | 60 |
| 15 | 83 |
Large (≥25kg — Golden, Lab, Shepherd)
| Dog age | Human age |
|---|---|
| 1 | 12 |
| 2 | 22 |
| 5 | 42 |
| 10 | 75 |
| 12 | 89 |
Large breeds age fast — 10 dog years ≈ 75 human years.
Cat conversion
| Cat age | Human age |
|---|---|
| 1 | 15 |
| 2 | 24 |
| 5 | 36 |
| 10 | 56 |
| 15 | 76 |
| 20 | 96 |
Cats vary little by breed, so a single table works.
Stage-by-stage care
- 0–1 yr (puppy/kitten): core vaccines, socialization, neuter window
- 1–7 (adult): annual checkup, weight control
- 7–10 (senior onset): 2× yearly checkup; kidneys, joints, dental
- 10+ (geriatric): quarterly checkup; CDS, diabetes, cardiac monitoring
Frequently missed care
- Dental: 80% of dogs over 3 have periodontal disease
- Weight: 1kg of obesity in a small dog ≈ 5kg in a human
- Cognitive decline: 25% of 10+ dogs show CDS signs
- Socialization gap → separation-anxiety spike
Recommended tools
- Pet Age Converter — auto by breed size/species
- Pet Food Calculator — by weight/activity
- Toxic Food Checker — chocolate, grapes, onion
- Pet Vaccination Schedule — species-specific
Bottom line
The "× 7" rule forced a curve into a line. Modern averages: ~100 human-equivalent years for small dogs, ~75 for large dogs. Always factor in breed size for accurate conversion.