Donkey Gestation Calculator

How to use the donkey gestation calculator

1. 1. Choose what you know. Enter the breeding date to get a due date, or switch to the target due date mode to work backwards to the breeding date you need.
2. 2. Refine the inputs. The calculator uses the 365-day average for this species.
3. 3. Plan around the range. Use the earliest and latest dates and the milestone timeline to schedule checks, feed changes and preparation of the foaling area.

How long is a donkey's gestation period?

The average is 365 days from breeding to foaling, about 11 months and 4 weeks. Anything between 340 and 390 days is normal, and a typical litter is 1 foal. Treat the calculated date as the middle of that window rather than a fixed appointment.

Donkey gestation table: breeding date to foaling date

Breeding dates one week apart with the matching foaling date at 365 days.

Working backwards from a target foaling date

If you want foals on the ground in a particular week, switch the calculator to target date mode and enter the date you are aiming for. It subtracts 365 days to give the breeding date to book, plus the earliest and latest service dates that still land inside your window.