Foaling Date Calculator

The average gestation length in the mare ranges from 320 to 362 days; most mares will foal within 330-345 days of successful breeding. However, mares have successfully foaled with gestation lengths outside this range.

This is an estimation tool only.

Foaling Date Calculator:

Breeding Date: (MM/DD/YYYY)

Expected Foaling Date:

Possible Range: to
Expected date based on 342 day gestation.
Range based on 335 days to 360 days.