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Convert dog years to human years using the scientific UCSD formula, not the outdated ×7 myth.
Accepts half years (0.5, 1.5, etc.)
Dog Years Calculator converts dog years to human years using the 2019 UCSD scientific formula (human age = 16 × ln(dogAge) + 31) based on DNA methylation patterns — not the inaccurate multiply-by-7 rule.
Calculate your dog's real biological age using the 2019 UCSD epigenetic study formula: 16 × ln(dogAge) + 31.
Enter your dog's age in years.
Optionally select their size/breed.
See their human age equivalent and life stage.
Formula from Wang et al. (2019) Cell Systems: human equivalent age = 16 × ln(dog age) + 31. Based on methylation patterns in Labrador DNA. More accurate than the ×7 rule for ages 1–16.
Dogs age rapidly in early years then slow down. A 1-year-old dog is already ~30 in human terms, not 7.
The 2019 UCSD scientific formula: human age = 16 × ln(dog age) + 31, based on DNA methylation patterns.