First Date Your Horse was Bred
(mm/dd/yyyy)
Horse’s Approximate Due Date
*Uses an average 340 day gestation period for a Horse. Horse gestation periods can generally be anywhere from 320-370 days.

Horse Gestation Calculator: About the Results

The Horse Gestation Calculator is a much simpler process to use than the traditional Horse Gestation Chart where you had to count the days until your Mare’s due date. This calculator in no way should take away from the need for you to seek a veterinarian’s professional advice. There are many items a professional vet will notice about proper care for your Horse (Mare).

Important Guidelines in Using Our Mare Pregnancy Calendar Calculator

GestationCalculator.com is providing this Horse pregnancy calculator as a service to the Horse lover community to help visitors answer the question ‘What is the due date for a horse?’ or ‘How Long Are Horses Pregnant For?’ It’s important that you enter the 1st day your Horse was bred for it to work properly. Some Horse Breeders will find this tool very helpful, so remember to bookmark it. Also, try using any of our other gestation calculators just for fun! Please direct any questions you may have to askabreeder@gmail.com.