Dog-to-Human Age Converter
Convert a dog's age to human years with the modern size-adjusted formula.
Human-equivalent age
40 yrs
Crude 1:7 estimate
35 yrs
Size class
medium
Calibrated against the 2019 UC San Diego methylation study — the 1:7 myth overstates small breeds and understates large ones. Senior milestones hit at 7 (small), 9 (medium), 6 (large), 5 (giant).
About this tool
Type your dog's age and size class (small, medium, large, giant). Get the modern methylation-calibrated equivalent age, plus the simple 'dog years = 7 ×' comparison. Targets the r/dogs recurring 'how old is my dog in human years' question — the actual answer depends on size, not the 1:7 myth.
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