Goat Gestation Calculator
Last updated
A goat's gestation period is about 150 days, or roughly 4 months and 4 weeks, though it ranges from 145 to 155 days depending on breed and individual animal.
Calculate a kid due date
Estimated kidding date
Friday, 26 March 2027
Earliest
21 Mar 2027
Latest
31 Mar 2027
0 of 150 days elapsed
Milestone timeline
| Day | Milestone | Date |
|---|---|---|
| 21 | Doe returns to heat if she did not conceive | 17 Nov 2026 |
| 35 | Ultrasound confirms pregnancy reliably from about five weeks | 1 Dec 2026 |
| 100 | Dry off milking does — 50 days of rest before kidding | 4 Feb 2027 |
| 120 | Start the increased ration and give clostridial boosters | 24 Feb 2027 |
| 145 | Move to a clean kidding pen; ligaments start to soften | 21 Mar 2027 |
| 150 | Expected kidding | 26 Mar 2027 |
How to use the goat 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. Pick the breed so the calculator uses the right average gestation length.
- 3. Plan around the range. Use the earliest and latest dates and the milestone timeline to schedule checks, feed changes and preparation of the kidding area.
How long is a goat's gestation period?
The average is 150 days from breeding to kidding, about 4 months and 4 weeks. Anything between 145 and 155 days is normal, and a typical litter is 1-3 kids. Treat the calculated date as the middle of that window rather than a fixed appointment.
Goat gestation table: breeding date to kidding date
Breeding dates one week apart with the matching kidding date at 150 days.
| Breeding date | Expected kidding date |
|---|---|
| 27 Oct 2026 | 26 Mar 2027 |
| 3 Nov 2026 | 2 Apr 2027 |
| 10 Nov 2026 | 9 Apr 2027 |
| 17 Nov 2026 | 16 Apr 2027 |
| 24 Nov 2026 | 23 Apr 2027 |
| 1 Dec 2026 | 30 Apr 2027 |
| 8 Dec 2026 | 7 May 2027 |
| 15 Dec 2026 | 14 May 2027 |
| 22 Dec 2026 | 21 May 2027 |
| 29 Dec 2026 | 28 May 2027 |
| 5 Jan 2027 | 4 Jun 2027 |
| 12 Jan 2027 | 11 Jun 2027 |
How breed changes the kidding date
Selecting a breed swaps the average the calculator uses, which can move the kidding date by more than a week.
| Breed | Average days | Difference |
|---|---|---|
| Average | 150 | — |
| Nigerian Dwarf | 145 | -5 days |
| Pygmy | 147 | -3 days |
| Boer | 148 | -2 days |
| Nubian | 150 | — |
| Alpine | 150 | — |
| Saanen | 150 | — |
| Toggenburg | 151 | +1 days |
| Angora | 151 | +1 days |
Working backwards from a target kidding date
If you want kids on the ground in a particular week, switch the calculator to target date mode and enter the date you are aiming for. It subtracts 150 days to give the breeding date to book, plus the earliest and latest service dates that still land inside your window.