average age of a horse
21 to 70 years. After 4th year, each horse year = 2.5 human years. The above table is an average of different horse breeds, based on a well-kept domestic horse. It uses an average horse lifespan of 24 years and an average human lifespan of 70 years. Wild horses and poorly kept horses have a much shorter lifespan, while some breeds (e.g. Arabian and many pony breeds) have a longer lifespan. To allow for different breed lifespans, simply use the following calculator: