Dog to Human Age Calculator

Calculate how old your beloved dog is in human years and see the comparison!

Calculator for Cat

Dog Photo

Upload or Drag your dog photo

Dog Name

Birth Date

Dog Size

Small (<9kg) - Chihuahua, Yorkshire Terrier Medium (9-23kg) - Beagle, Border Collie Large (23-41kg) - Labrador, German Shepherd Giant (>41kg) - Great Dane, Mastiff

Calculation Result

See other conversion: 1 Month Old Dog = 1.1 human years 3 Month Old Dog = 3.3 human years 5 Month Old Dog = 5.4 human years 1 Year Old Dog = 13 human years 2 Year Old Dog = 22.5 human years 5 Year Old Dog = 36 human years 10 Year Old Dog = 58.5 human years 20 Year Old Dog = 103.5 human years

How is it Calculated?

Formula based on dog size:
• Small: Year 1 = 12, Year 2 = 9, Subsequent = 4 human years
• Medium: Year 1 = 13, Year 2 = 9.5, Subsequent = 4.5 human years
• Large: Year 1 = 14, Year 2 = 10, Subsequent = 5.5 human years
• Giant: Year 1 = 15, Year 2 = 10, Subsequent = 6 human years

This formula is based on 2020 research that considers differences in dog size and breed. Large dogs tend to age faster than small dogs.

Research Reference: "Quantitative translation of dog-to-human aging"