Horse age in human years
Horses mature far faster than people in their first few years and then age more slowly. This calculator converts any horse age into the human-year equivalent and shows the matching life stage — foal, yearling, young adult, prime, senior or geriatric — so you can plan feeding, workload, dentals and veterinary checks appropriately.
The calculator itself is interactive and loads with the page. It is free, needs no signup, and nothing you enter is stored.