Horse Gestation Calculator
Calculate the expected foaling date based on the breeding date. Average equine gestation is 340 days.
Formula
Due Date = Breeding Date + 340 days
- Average equine gestation: 340 days (range 320–370).
- Mares may also be checked with ultrasound from day 14 post-ovulation.
Bred January 1
Inputs
- Breeding Date: 2025-01-01
- Gestation Period: 340 days
Jan 1 + 340 days = December 7.
Frequently asked questions
How long is a horse's pregnancy?
About 11 months (340 days), ranging from 320 to 370 days.
Can I predict exact foaling date?
Not precisely. Monitor for pre-foaling signs: waxing of teats, relaxation of hindquarters.