Donkey Gestation Calculator
Last updated
A donkey's gestation period is about 365 days, or roughly 11 months and 4 weeks, though it ranges from 340 to 390 days depending on breed and individual animal.
Calculate a foal due date
Estimated foaling date
Wednesday, 27 October 2027
Earliest
2 Oct 2027
Latest
21 Nov 2027
0 of 365 days elapsed
Milestone timeline
| Day | Milestone | Date |
|---|---|---|
| 16 | Early ultrasound: confirm pregnancy and check for twins | 12 Nov 2026 |
| 60 | Second scan — twin pregnancies in donkeys are high risk | 26 Dec 2026 |
| 210 | Vaccination and worming ahead of foaling | 25 May 2027 |
| 300 | Increase the ration; most foal growth is in the last trimester | 23 Aug 2027 |
| 345 | Earliest normal foaling — move her to the foaling area | 7 Oct 2027 |
| 365 | Expected foaling (a year is the practical rule) | 27 Oct 2027 |
| 390 | Still no foal? Donkeys often go this long, but have a vet check her | 21 Nov 2027 |
How to use the donkey gestation calculator
- 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. Refine the inputs. The calculator uses the 365-day average for this species.
- 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.
| Breeding date | Expected foaling date |
|---|---|
| 27 Oct 2026 | 27 Oct 2027 |
| 3 Nov 2026 | 3 Nov 2027 |
| 10 Nov 2026 | 10 Nov 2027 |
| 17 Nov 2026 | 17 Nov 2027 |
| 24 Nov 2026 | 24 Nov 2027 |
| 1 Dec 2026 | 1 Dec 2027 |
| 8 Dec 2026 | 8 Dec 2027 |
| 15 Dec 2026 | 15 Dec 2027 |
| 22 Dec 2026 | 22 Dec 2027 |
| 29 Dec 2026 | 29 Dec 2027 |
| 5 Jan 2027 | 5 Jan 2028 |
| 12 Jan 2027 | 12 Jan 2028 |
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.