Donkey
Donkey Gestation Period: Free Calculator, Chart and Key Dates
A donkey is pregnant for 365 days on average, which is 52 weeks and 1 day, or about 12 months. The normal range is 340 to 390 days. Enter the mating date in the calculator below to receive the due date, the earliest and latest foaling dates and every milestone.
365 days
Average
340–390
Normal range (days)
1
Foal per birth
What Is the Donkey Gestation Calculator?
The donkey gestation calculator is a free calculator that converts a mating date into a foaling date. Gestation is the time from conception to birth. A donkey carries its young for 365 days on average, and a normal pregnancy ends between day 340 and day 390. Each birth produces 1 foal.
The calculator returns:
- Expected foaling date The most likely date, counted from your breeding date.
- Earliest and latest normal dates Day 340 and day 390.
- 7 milestones With calendar dates, from day 16 to day 390.
- Calendar file Add the dates to Google Calendar, Apple Calendar and Outlook.
Entering a target foaling date returns the matching mating date.
Example: a donkey with a mating date of 1 March 2026 is due on 1 March 2027 (day 365). The normal range runs from 4 February 2027 (day 340) to 26 March 2027 (day 390).
Problems the Donkey Gestation Calculator Solves
- You do not know when the foal are due. The calculator applies the 365-day average and the 340–390 day range to your date, so you know the day to prepare and the day the foaling window opens.
- You are counting days by hand. Counting 365 days across months and years causes errors. The calculator performs the date arithmetic and shows each stage on a calendar.
- You need to plan ahead. Each result dates 7 milestones, starting on day 16 (early ultrasound: confirm pregnancy and check for twins) and ending with the expected foaling on day 365.
- You track more than one donkey. The herd planner lists every donkey with its date and sorts all foaling dates into one table.
How the Donkey Gestation Calculator Works
- Enter the date. Use the mating date, or enter a target foaling date to work backwards.
- Add your own gestation length (optional). Enter the figure your veterinarian gives you if it differs from the 365-day average.
- Read the result. See the foaling date, the 340–390 day range and the milestones.
- Save or share it. Add the dates to your calendar, print the chart, or copy a link that reopens the calculator with your dates.
Donkey Timeline: Key Dates
This table lists the 7 milestones the calculator dates for a donkey. Day numbers count from the mating date. The dates assume a mating date of 1 March 2026.
| Day | Date | Milestone |
|---|---|---|
| 16 | 17 March 2026 | Early ultrasound: confirm pregnancy and check for twins |
| 60 | 30 April 2026 | Second scan — twin pregnancies in donkeys are high risk |
| 210 | 27 September 2026 | Vaccination and worming ahead of foaling |
| 300 | 26 December 2026 | Increase the ration; most foal growth is in the last trimester |
| 345 | 9 February 2027 | Earliest normal foaling — move her to the foaling area |
| 365 | 1 March 2027 | Expected foaling (a year is the practical rule) |
| 390 | 26 March 2027 | Still no foal? Donkeys often go this long, but have a vet check her |
Source: published averages, loaded into the calculator. Each animal falls anywhere inside the 340–390 day range.
Why Choose Animal Gestation Calculator for Your Donkey
- A range with every date. You see day 340, day 365 and day 390, not one guess.
- Your own gestation length. Enter the figure your veterinarian provides.
- Dated milestones. Every milestone sits on your calendar.
- Calendar export and printing. Add the dates to Google Calendar, Apple Calendar or Outlook, or print the 12-month breeding chart.
- Free and private. No account is required, and your entries stay in your browser.
- Published sources. Every figure comes from a published average, and every page labels it an estimate.
Who Uses the Donkey Gestation Calculator
- Farmers and ranchers planning the birthing season.
- Herd and flock managers tracking breeding dates for each female.
- Agricultural students who need a gestation chart.
- Veterinary students who need a gestation chart.
Gestation Calculators for Other Livestock
Compare the donkey’s 365 days with nearby livestock: the llama gestation calculator (350 days), the alpaca gestation calculator (345 days), the horse gestation calculator (340 days), the camel gestation calculator (395 days), the water buffalo gestation calculator (310 days). The home page lists the gestation period of all 75 animals.
Donkey 12-Month Breeding Date Chart
Based on a 365-day gestation, using 2027 as the example year. Find the breeding date on the left and the expected foaling date on the right. A year after the date means it falls in a later year. In a leap year, dates after 29 February move by a day.
| Bred | Due |
|---|---|
| 1 | Jan 1 2028 |
| 2 | Jan 2 2028 |
| 3 | Jan 3 2028 |
| 4 | Jan 4 2028 |
| 5 | Jan 5 2028 |
| 6 | Jan 6 2028 |
| 7 | Jan 7 2028 |
| 8 | Jan 8 2028 |
| 9 | Jan 9 2028 |
| 10 | Jan 10 2028 |
| 11 | Jan 11 2028 |
| 12 | Jan 12 2028 |
| 13 | Jan 13 2028 |
| 14 | Jan 14 2028 |
| 15 | Jan 15 2028 |
| 16 | Jan 16 2028 |
| 17 | Jan 17 2028 |
| 18 | Jan 18 2028 |
| 19 | Jan 19 2028 |
| 20 | Jan 20 2028 |
| 21 | Jan 21 2028 |
| 22 | Jan 22 2028 |
| 23 | Jan 23 2028 |
| 24 | Jan 24 2028 |
| 25 | Jan 25 2028 |
| 26 | Jan 26 2028 |
| 27 | Jan 27 2028 |
| 28 | Jan 28 2028 |
| 29 | Jan 29 2028 |
| 30 | Jan 30 2028 |
| 31 | Jan 31 2028 |
| Bred | Due |
|---|---|
| 1 | Feb 1 2028 |
| 2 | Feb 2 2028 |
| 3 | Feb 3 2028 |
| 4 | Feb 4 2028 |
| 5 | Feb 5 2028 |
| 6 | Feb 6 2028 |
| 7 | Feb 7 2028 |
| 8 | Feb 8 2028 |
| 9 | Feb 9 2028 |
| 10 | Feb 10 2028 |
| 11 | Feb 11 2028 |
| 12 | Feb 12 2028 |
| 13 | Feb 13 2028 |
| 14 | Feb 14 2028 |
| 15 | Feb 15 2028 |
| 16 | Feb 16 2028 |
| 17 | Feb 17 2028 |
| 18 | Feb 18 2028 |
| 19 | Feb 19 2028 |
| 20 | Feb 20 2028 |
| 21 | Feb 21 2028 |
| 22 | Feb 22 2028 |
| 23 | Feb 23 2028 |
| 24 | Feb 24 2028 |
| 25 | Feb 25 2028 |
| 26 | Feb 26 2028 |
| 27 | Feb 27 2028 |
| 28 | Feb 28 2028 |
| Bred | Due |
|---|---|
| 1 | Feb 29 2028 |
| 2 | Mar 1 2028 |
| 3 | Mar 2 2028 |
| 4 | Mar 3 2028 |
| 5 | Mar 4 2028 |
| 6 | Mar 5 2028 |
| 7 | Mar 6 2028 |
| 8 | Mar 7 2028 |
| 9 | Mar 8 2028 |
| 10 | Mar 9 2028 |
| 11 | Mar 10 2028 |
| 12 | Mar 11 2028 |
| 13 | Mar 12 2028 |
| 14 | Mar 13 2028 |
| 15 | Mar 14 2028 |
| 16 | Mar 15 2028 |
| 17 | Mar 16 2028 |
| 18 | Mar 17 2028 |
| 19 | Mar 18 2028 |
| 20 | Mar 19 2028 |
| 21 | Mar 20 2028 |
| 22 | Mar 21 2028 |
| 23 | Mar 22 2028 |
| 24 | Mar 23 2028 |
| 25 | Mar 24 2028 |
| 26 | Mar 25 2028 |
| 27 | Mar 26 2028 |
| 28 | Mar 27 2028 |
| 29 | Mar 28 2028 |
| 30 | Mar 29 2028 |
| 31 | Mar 30 2028 |
| Bred | Due |
|---|---|
| 1 | Mar 31 2028 |
| 2 | Apr 1 2028 |
| 3 | Apr 2 2028 |
| 4 | Apr 3 2028 |
| 5 | Apr 4 2028 |
| 6 | Apr 5 2028 |
| 7 | Apr 6 2028 |
| 8 | Apr 7 2028 |
| 9 | Apr 8 2028 |
| 10 | Apr 9 2028 |
| 11 | Apr 10 2028 |
| 12 | Apr 11 2028 |
| 13 | Apr 12 2028 |
| 14 | Apr 13 2028 |
| 15 | Apr 14 2028 |
| 16 | Apr 15 2028 |
| 17 | Apr 16 2028 |
| 18 | Apr 17 2028 |
| 19 | Apr 18 2028 |
| 20 | Apr 19 2028 |
| 21 | Apr 20 2028 |
| 22 | Apr 21 2028 |
| 23 | Apr 22 2028 |
| 24 | Apr 23 2028 |
| 25 | Apr 24 2028 |
| 26 | Apr 25 2028 |
| 27 | Apr 26 2028 |
| 28 | Apr 27 2028 |
| 29 | Apr 28 2028 |
| 30 | Apr 29 2028 |
| Bred | Due |
|---|---|
| 1 | Apr 30 2028 |
| 2 | May 1 2028 |
| 3 | May 2 2028 |
| 4 | May 3 2028 |
| 5 | May 4 2028 |
| 6 | May 5 2028 |
| 7 | May 6 2028 |
| 8 | May 7 2028 |
| 9 | May 8 2028 |
| 10 | May 9 2028 |
| 11 | May 10 2028 |
| 12 | May 11 2028 |
| 13 | May 12 2028 |
| 14 | May 13 2028 |
| 15 | May 14 2028 |
| 16 | May 15 2028 |
| 17 | May 16 2028 |
| 18 | May 17 2028 |
| 19 | May 18 2028 |
| 20 | May 19 2028 |
| 21 | May 20 2028 |
| 22 | May 21 2028 |
| 23 | May 22 2028 |
| 24 | May 23 2028 |
| 25 | May 24 2028 |
| 26 | May 25 2028 |
| 27 | May 26 2028 |
| 28 | May 27 2028 |
| 29 | May 28 2028 |
| 30 | May 29 2028 |
| 31 | May 30 2028 |
| Bred | Due |
|---|---|
| 1 | May 31 2028 |
| 2 | Jun 1 2028 |
| 3 | Jun 2 2028 |
| 4 | Jun 3 2028 |
| 5 | Jun 4 2028 |
| 6 | Jun 5 2028 |
| 7 | Jun 6 2028 |
| 8 | Jun 7 2028 |
| 9 | Jun 8 2028 |
| 10 | Jun 9 2028 |
| 11 | Jun 10 2028 |
| 12 | Jun 11 2028 |
| 13 | Jun 12 2028 |
| 14 | Jun 13 2028 |
| 15 | Jun 14 2028 |
| 16 | Jun 15 2028 |
| 17 | Jun 16 2028 |
| 18 | Jun 17 2028 |
| 19 | Jun 18 2028 |
| 20 | Jun 19 2028 |
| 21 | Jun 20 2028 |
| 22 | Jun 21 2028 |
| 23 | Jun 22 2028 |
| 24 | Jun 23 2028 |
| 25 | Jun 24 2028 |
| 26 | Jun 25 2028 |
| 27 | Jun 26 2028 |
| 28 | Jun 27 2028 |
| 29 | Jun 28 2028 |
| 30 | Jun 29 2028 |
| Bred | Due |
|---|---|
| 1 | Jun 30 2028 |
| 2 | Jul 1 2028 |
| 3 | Jul 2 2028 |
| 4 | Jul 3 2028 |
| 5 | Jul 4 2028 |
| 6 | Jul 5 2028 |
| 7 | Jul 6 2028 |
| 8 | Jul 7 2028 |
| 9 | Jul 8 2028 |
| 10 | Jul 9 2028 |
| 11 | Jul 10 2028 |
| 12 | Jul 11 2028 |
| 13 | Jul 12 2028 |
| 14 | Jul 13 2028 |
| 15 | Jul 14 2028 |
| 16 | Jul 15 2028 |
| 17 | Jul 16 2028 |
| 18 | Jul 17 2028 |
| 19 | Jul 18 2028 |
| 20 | Jul 19 2028 |
| 21 | Jul 20 2028 |
| 22 | Jul 21 2028 |
| 23 | Jul 22 2028 |
| 24 | Jul 23 2028 |
| 25 | Jul 24 2028 |
| 26 | Jul 25 2028 |
| 27 | Jul 26 2028 |
| 28 | Jul 27 2028 |
| 29 | Jul 28 2028 |
| 30 | Jul 29 2028 |
| 31 | Jul 30 2028 |
| Bred | Due |
|---|---|
| 1 | Jul 31 2028 |
| 2 | Aug 1 2028 |
| 3 | Aug 2 2028 |
| 4 | Aug 3 2028 |
| 5 | Aug 4 2028 |
| 6 | Aug 5 2028 |
| 7 | Aug 6 2028 |
| 8 | Aug 7 2028 |
| 9 | Aug 8 2028 |
| 10 | Aug 9 2028 |
| 11 | Aug 10 2028 |
| 12 | Aug 11 2028 |
| 13 | Aug 12 2028 |
| 14 | Aug 13 2028 |
| 15 | Aug 14 2028 |
| 16 | Aug 15 2028 |
| 17 | Aug 16 2028 |
| 18 | Aug 17 2028 |
| 19 | Aug 18 2028 |
| 20 | Aug 19 2028 |
| 21 | Aug 20 2028 |
| 22 | Aug 21 2028 |
| 23 | Aug 22 2028 |
| 24 | Aug 23 2028 |
| 25 | Aug 24 2028 |
| 26 | Aug 25 2028 |
| 27 | Aug 26 2028 |
| 28 | Aug 27 2028 |
| 29 | Aug 28 2028 |
| 30 | Aug 29 2028 |
| 31 | Aug 30 2028 |
| Bred | Due |
|---|---|
| 1 | Aug 31 2028 |
| 2 | Sep 1 2028 |
| 3 | Sep 2 2028 |
| 4 | Sep 3 2028 |
| 5 | Sep 4 2028 |
| 6 | Sep 5 2028 |
| 7 | Sep 6 2028 |
| 8 | Sep 7 2028 |
| 9 | Sep 8 2028 |
| 10 | Sep 9 2028 |
| 11 | Sep 10 2028 |
| 12 | Sep 11 2028 |
| 13 | Sep 12 2028 |
| 14 | Sep 13 2028 |
| 15 | Sep 14 2028 |
| 16 | Sep 15 2028 |
| 17 | Sep 16 2028 |
| 18 | Sep 17 2028 |
| 19 | Sep 18 2028 |
| 20 | Sep 19 2028 |
| 21 | Sep 20 2028 |
| 22 | Sep 21 2028 |
| 23 | Sep 22 2028 |
| 24 | Sep 23 2028 |
| 25 | Sep 24 2028 |
| 26 | Sep 25 2028 |
| 27 | Sep 26 2028 |
| 28 | Sep 27 2028 |
| 29 | Sep 28 2028 |
| 30 | Sep 29 2028 |
| Bred | Due |
|---|---|
| 1 | Sep 30 2028 |
| 2 | Oct 1 2028 |
| 3 | Oct 2 2028 |
| 4 | Oct 3 2028 |
| 5 | Oct 4 2028 |
| 6 | Oct 5 2028 |
| 7 | Oct 6 2028 |
| 8 | Oct 7 2028 |
| 9 | Oct 8 2028 |
| 10 | Oct 9 2028 |
| 11 | Oct 10 2028 |
| 12 | Oct 11 2028 |
| 13 | Oct 12 2028 |
| 14 | Oct 13 2028 |
| 15 | Oct 14 2028 |
| 16 | Oct 15 2028 |
| 17 | Oct 16 2028 |
| 18 | Oct 17 2028 |
| 19 | Oct 18 2028 |
| 20 | Oct 19 2028 |
| 21 | Oct 20 2028 |
| 22 | Oct 21 2028 |
| 23 | Oct 22 2028 |
| 24 | Oct 23 2028 |
| 25 | Oct 24 2028 |
| 26 | Oct 25 2028 |
| 27 | Oct 26 2028 |
| 28 | Oct 27 2028 |
| 29 | Oct 28 2028 |
| 30 | Oct 29 2028 |
| 31 | Oct 30 2028 |
| Bred | Due |
|---|---|
| 1 | Oct 31 2028 |
| 2 | Nov 1 2028 |
| 3 | Nov 2 2028 |
| 4 | Nov 3 2028 |
| 5 | Nov 4 2028 |
| 6 | Nov 5 2028 |
| 7 | Nov 6 2028 |
| 8 | Nov 7 2028 |
| 9 | Nov 8 2028 |
| 10 | Nov 9 2028 |
| 11 | Nov 10 2028 |
| 12 | Nov 11 2028 |
| 13 | Nov 12 2028 |
| 14 | Nov 13 2028 |
| 15 | Nov 14 2028 |
| 16 | Nov 15 2028 |
| 17 | Nov 16 2028 |
| 18 | Nov 17 2028 |
| 19 | Nov 18 2028 |
| 20 | Nov 19 2028 |
| 21 | Nov 20 2028 |
| 22 | Nov 21 2028 |
| 23 | Nov 22 2028 |
| 24 | Nov 23 2028 |
| 25 | Nov 24 2028 |
| 26 | Nov 25 2028 |
| 27 | Nov 26 2028 |
| 28 | Nov 27 2028 |
| 29 | Nov 28 2028 |
| 30 | Nov 29 2028 |
| Bred | Due |
|---|---|
| 1 | Nov 30 2028 |
| 2 | Dec 1 2028 |
| 3 | Dec 2 2028 |
| 4 | Dec 3 2028 |
| 5 | Dec 4 2028 |
| 6 | Dec 5 2028 |
| 7 | Dec 6 2028 |
| 8 | Dec 7 2028 |
| 9 | Dec 8 2028 |
| 10 | Dec 9 2028 |
| 11 | Dec 10 2028 |
| 12 | Dec 11 2028 |
| 13 | Dec 12 2028 |
| 14 | Dec 13 2028 |
| 15 | Dec 14 2028 |
| 16 | Dec 15 2028 |
| 17 | Dec 16 2028 |
| 18 | Dec 17 2028 |
| 19 | Dec 18 2028 |
| 20 | Dec 19 2028 |
| 21 | Dec 20 2028 |
| 22 | Dec 21 2028 |
| 23 | Dec 22 2028 |
| 24 | Dec 23 2028 |
| 25 | Dec 24 2028 |
| 26 | Dec 25 2028 |
| 27 | Dec 26 2028 |
| 28 | Dec 27 2028 |
| 29 | Dec 28 2028 |
| 30 | Dec 29 2028 |
| 31 | Dec 30 2028 |
Frequently Asked Questions
How long is a donkey pregnant?
A donkey is pregnant for 365 days on average, which is 52 weeks and 1 day, or about 12 months. The normal range is 340 to 390 days. Use the donkey gestation calculator for your animal’s date.
How many days is the pregnancy of a donkey?
The average is 365 days. The shortest normal pregnancy is 340 days and the longest is 390 days, a spread of 50 days.
How do I calculate the due date?
Add 365 days to the mating date. A donkey with a mating date of 1 March 2026 is due on 1 March 2027, within a range from 4 February 2027 to 26 March 2027. The calculator does the arithmetic for any date.
How accurate is the calculator?
The calculator gives an estimate from the published average. A normal pregnancy ends between day 340 and day 390. A veterinarian can give a more precise date for your animal.
How many young does a donkey have?
Each birth produces 1 foal.
What are the key dates in the pregnancy?
The calculator dates 7 milestones: day 16, early ultrasound: confirm pregnancy and check for twins; day 60, second scan — twin pregnancies in donkeys are high risk; day 210, vaccination and worming ahead of foaling; day 300, increase the ration; most foal growth is in the last trimester; day 345, earliest normal foaling — move her to the foaling area; day 365, expected foaling (a year is the practical rule); day 390, still no foal? Donkeys often go this long, but have a vet check her. The timeline table above lists each one.
When is the expected foaling date?
The expected foaling date is day 365, which is 52 weeks and 1 day, or about 12 months after the mating date.
How does the pregnancy compare with other animals?
At 365 days the donkey carries its young longer than a human (280 days) and longer than a dog (63 days). The home page lists the gestation period of all 75 animals.
Is the calculator veterinary advice?
No. The calculator provides estimates for planning only. Every animal is different. Consult a qualified veterinarian about your animal’s pregnancy, health and foaling, and contact a veterinarian immediately in an emergency.
Find Your Donkey’s Due Date Now
Enter the mating date and receive the foaling date, the 340–390 day range and the milestones in seconds.
Read our Disclaimer, Privacy Policy and Terms of Use, or return to the Animal Gestation Calculator home page.
Important notice: All dates and figures are estimates for planning only and are not veterinary advice. Consult a qualified veterinarian.