Alpaca
Alpaca Gestation Period: Free Calculator, Chart and Key Dates
An alpaca is pregnant for 345 days on average, which is 49 weeks and 2 days, or about 11 months. The normal range is 335 to 355 days. Enter the mating date in the calculator below to receive the due date, the earliest and latest birthing dates and every milestone.
345 days
Average
335–355
Normal range (days)
1
Cria per birth
What Is the Alpaca Gestation Calculator?
The alpaca gestation calculator is a free calculator that converts a mating date into a birthing date. Gestation is the time from conception to birth. An alpaca carries its young for 345 days on average, and a normal pregnancy ends between day 335 and day 355. Each birth produces 1 cria.
The calculator returns:
- Expected birthing date The most likely date, counted from your breeding date.
- Earliest and latest normal dates Day 335 and day 355.
- 7 milestones With calendar dates, from day 14 to day 345.
- Calendar file Add the dates to Google Calendar, Apple Calendar and Outlook.
Entering a target birthing date returns the matching mating date.
Example: an alpaca with a mating date of 1 March 2026 is due on 9 February 2027 (day 345). The normal range runs from 30 January 2027 (day 335) to 19 February 2027 (day 355).
Problems the Alpaca Gestation Calculator Solves
- You do not know when the cria are due. The calculator applies the 345-day average and the 335–355 day range to your date, so you know the day to prepare and the day the birthing window opens.
- You are counting days by hand. Counting 345 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 14 (spit-off test: an open female sits for the male, a pregnant one spits) and ending with the expected birthing on day 345.
- You track more than one alpaca. The herd planner lists every alpaca with its date and sorts all birthing dates into one table.
How the Alpaca Gestation Calculator Works
- Enter the date. Use the mating date, or enter a target birthing date to work backwards.
- Add your own gestation length (optional). Enter the figure your veterinarian gives you if it differs from the 345-day average.
- Read the result. See the birthing date, the 335–355 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.
Alpaca Timeline: Key Dates
This table lists the 7 milestones the calculator dates for an alpaca. Day numbers count from the mating date. The dates assume a mating date of 1 March 2026.
| Day | Date | Milestone |
|---|---|---|
| 14 | 15 March 2026 | Spit-off test: an open female sits for the male, a pregnant one spits |
| 45 | 15 April 2026 | Ultrasound or progesterone test confirms the pregnancy |
| 90 | 30 May 2026 | Recheck — early embryo loss is common in alpacas |
| 240 | 27 October 2026 | Clostridial booster so the cria gets antibodies via colostrum |
| 300 | 26 December 2026 | Shear or crutch her and lift the ration for the final growth phase |
| 335 | 30 January 2027 | Earliest normal birthing — start morning checks |
| 345 | 9 February 2027 | Expected birthing (unpacking) |
Source: published averages, loaded into the calculator. Each animal falls anywhere inside the 335–355 day range.
Why Choose Animal Gestation Calculator for Your Alpaca
- A range with every date. You see day 335, day 345 and day 355, 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 Alpaca 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 alpaca’s 345 days with nearby livestock: the horse gestation calculator (340 days), the llama gestation calculator (350 days), the donkey gestation calculator (365 days), the water buffalo gestation calculator (310 days), the camel gestation calculator (395 days). The home page lists the gestation period of all 75 animals.
Alpaca 12-Month Breeding Date Chart
Based on a 345-day gestation, using 2027 as the example year. Find the breeding date on the left and the expected birthing 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 | Dec 12 |
| 2 | Dec 13 |
| 3 | Dec 14 |
| 4 | Dec 15 |
| 5 | Dec 16 |
| 6 | Dec 17 |
| 7 | Dec 18 |
| 8 | Dec 19 |
| 9 | Dec 20 |
| 10 | Dec 21 |
| 11 | Dec 22 |
| 12 | Dec 23 |
| 13 | Dec 24 |
| 14 | Dec 25 |
| 15 | Dec 26 |
| 16 | Dec 27 |
| 17 | Dec 28 |
| 18 | Dec 29 |
| 19 | Dec 30 |
| 20 | Dec 31 |
| 21 | Jan 1 2028 |
| 22 | Jan 2 2028 |
| 23 | Jan 3 2028 |
| 24 | Jan 4 2028 |
| 25 | Jan 5 2028 |
| 26 | Jan 6 2028 |
| 27 | Jan 7 2028 |
| 28 | Jan 8 2028 |
| 29 | Jan 9 2028 |
| 30 | Jan 10 2028 |
| 31 | Jan 11 2028 |
| Bred | Due |
|---|---|
| 1 | Jan 12 2028 |
| 2 | Jan 13 2028 |
| 3 | Jan 14 2028 |
| 4 | Jan 15 2028 |
| 5 | Jan 16 2028 |
| 6 | Jan 17 2028 |
| 7 | Jan 18 2028 |
| 8 | Jan 19 2028 |
| 9 | Jan 20 2028 |
| 10 | Jan 21 2028 |
| 11 | Jan 22 2028 |
| 12 | Jan 23 2028 |
| 13 | Jan 24 2028 |
| 14 | Jan 25 2028 |
| 15 | Jan 26 2028 |
| 16 | Jan 27 2028 |
| 17 | Jan 28 2028 |
| 18 | Jan 29 2028 |
| 19 | Jan 30 2028 |
| 20 | Jan 31 2028 |
| 21 | Feb 1 2028 |
| 22 | Feb 2 2028 |
| 23 | Feb 3 2028 |
| 24 | Feb 4 2028 |
| 25 | Feb 5 2028 |
| 26 | Feb 6 2028 |
| 27 | Feb 7 2028 |
| 28 | Feb 8 2028 |
| Bred | Due |
|---|---|
| 1 | Feb 9 2028 |
| 2 | Feb 10 2028 |
| 3 | Feb 11 2028 |
| 4 | Feb 12 2028 |
| 5 | Feb 13 2028 |
| 6 | Feb 14 2028 |
| 7 | Feb 15 2028 |
| 8 | Feb 16 2028 |
| 9 | Feb 17 2028 |
| 10 | Feb 18 2028 |
| 11 | Feb 19 2028 |
| 12 | Feb 20 2028 |
| 13 | Feb 21 2028 |
| 14 | Feb 22 2028 |
| 15 | Feb 23 2028 |
| 16 | Feb 24 2028 |
| 17 | Feb 25 2028 |
| 18 | Feb 26 2028 |
| 19 | Feb 27 2028 |
| 20 | Feb 28 2028 |
| 21 | Feb 29 2028 |
| 22 | Mar 1 2028 |
| 23 | Mar 2 2028 |
| 24 | Mar 3 2028 |
| 25 | Mar 4 2028 |
| 26 | Mar 5 2028 |
| 27 | Mar 6 2028 |
| 28 | Mar 7 2028 |
| 29 | Mar 8 2028 |
| 30 | Mar 9 2028 |
| 31 | Mar 10 2028 |
| Bred | Due |
|---|---|
| 1 | Mar 11 2028 |
| 2 | Mar 12 2028 |
| 3 | Mar 13 2028 |
| 4 | Mar 14 2028 |
| 5 | Mar 15 2028 |
| 6 | Mar 16 2028 |
| 7 | Mar 17 2028 |
| 8 | Mar 18 2028 |
| 9 | Mar 19 2028 |
| 10 | Mar 20 2028 |
| 11 | Mar 21 2028 |
| 12 | Mar 22 2028 |
| 13 | Mar 23 2028 |
| 14 | Mar 24 2028 |
| 15 | Mar 25 2028 |
| 16 | Mar 26 2028 |
| 17 | Mar 27 2028 |
| 18 | Mar 28 2028 |
| 19 | Mar 29 2028 |
| 20 | Mar 30 2028 |
| 21 | Mar 31 2028 |
| 22 | Apr 1 2028 |
| 23 | Apr 2 2028 |
| 24 | Apr 3 2028 |
| 25 | Apr 4 2028 |
| 26 | Apr 5 2028 |
| 27 | Apr 6 2028 |
| 28 | Apr 7 2028 |
| 29 | Apr 8 2028 |
| 30 | Apr 9 2028 |
| Bred | Due |
|---|---|
| 1 | Apr 10 2028 |
| 2 | Apr 11 2028 |
| 3 | Apr 12 2028 |
| 4 | Apr 13 2028 |
| 5 | Apr 14 2028 |
| 6 | Apr 15 2028 |
| 7 | Apr 16 2028 |
| 8 | Apr 17 2028 |
| 9 | Apr 18 2028 |
| 10 | Apr 19 2028 |
| 11 | Apr 20 2028 |
| 12 | Apr 21 2028 |
| 13 | Apr 22 2028 |
| 14 | Apr 23 2028 |
| 15 | Apr 24 2028 |
| 16 | Apr 25 2028 |
| 17 | Apr 26 2028 |
| 18 | Apr 27 2028 |
| 19 | Apr 28 2028 |
| 20 | Apr 29 2028 |
| 21 | Apr 30 2028 |
| 22 | May 1 2028 |
| 23 | May 2 2028 |
| 24 | May 3 2028 |
| 25 | May 4 2028 |
| 26 | May 5 2028 |
| 27 | May 6 2028 |
| 28 | May 7 2028 |
| 29 | May 8 2028 |
| 30 | May 9 2028 |
| 31 | May 10 2028 |
| Bred | Due |
|---|---|
| 1 | May 11 2028 |
| 2 | May 12 2028 |
| 3 | May 13 2028 |
| 4 | May 14 2028 |
| 5 | May 15 2028 |
| 6 | May 16 2028 |
| 7 | May 17 2028 |
| 8 | May 18 2028 |
| 9 | May 19 2028 |
| 10 | May 20 2028 |
| 11 | May 21 2028 |
| 12 | May 22 2028 |
| 13 | May 23 2028 |
| 14 | May 24 2028 |
| 15 | May 25 2028 |
| 16 | May 26 2028 |
| 17 | May 27 2028 |
| 18 | May 28 2028 |
| 19 | May 29 2028 |
| 20 | May 30 2028 |
| 21 | May 31 2028 |
| 22 | Jun 1 2028 |
| 23 | Jun 2 2028 |
| 24 | Jun 3 2028 |
| 25 | Jun 4 2028 |
| 26 | Jun 5 2028 |
| 27 | Jun 6 2028 |
| 28 | Jun 7 2028 |
| 29 | Jun 8 2028 |
| 30 | Jun 9 2028 |
| Bred | Due |
|---|---|
| 1 | Jun 10 2028 |
| 2 | Jun 11 2028 |
| 3 | Jun 12 2028 |
| 4 | Jun 13 2028 |
| 5 | Jun 14 2028 |
| 6 | Jun 15 2028 |
| 7 | Jun 16 2028 |
| 8 | Jun 17 2028 |
| 9 | Jun 18 2028 |
| 10 | Jun 19 2028 |
| 11 | Jun 20 2028 |
| 12 | Jun 21 2028 |
| 13 | Jun 22 2028 |
| 14 | Jun 23 2028 |
| 15 | Jun 24 2028 |
| 16 | Jun 25 2028 |
| 17 | Jun 26 2028 |
| 18 | Jun 27 2028 |
| 19 | Jun 28 2028 |
| 20 | Jun 29 2028 |
| 21 | Jun 30 2028 |
| 22 | Jul 1 2028 |
| 23 | Jul 2 2028 |
| 24 | Jul 3 2028 |
| 25 | Jul 4 2028 |
| 26 | Jul 5 2028 |
| 27 | Jul 6 2028 |
| 28 | Jul 7 2028 |
| 29 | Jul 8 2028 |
| 30 | Jul 9 2028 |
| 31 | Jul 10 2028 |
| Bred | Due |
|---|---|
| 1 | Jul 11 2028 |
| 2 | Jul 12 2028 |
| 3 | Jul 13 2028 |
| 4 | Jul 14 2028 |
| 5 | Jul 15 2028 |
| 6 | Jul 16 2028 |
| 7 | Jul 17 2028 |
| 8 | Jul 18 2028 |
| 9 | Jul 19 2028 |
| 10 | Jul 20 2028 |
| 11 | Jul 21 2028 |
| 12 | Jul 22 2028 |
| 13 | Jul 23 2028 |
| 14 | Jul 24 2028 |
| 15 | Jul 25 2028 |
| 16 | Jul 26 2028 |
| 17 | Jul 27 2028 |
| 18 | Jul 28 2028 |
| 19 | Jul 29 2028 |
| 20 | Jul 30 2028 |
| 21 | Jul 31 2028 |
| 22 | Aug 1 2028 |
| 23 | Aug 2 2028 |
| 24 | Aug 3 2028 |
| 25 | Aug 4 2028 |
| 26 | Aug 5 2028 |
| 27 | Aug 6 2028 |
| 28 | Aug 7 2028 |
| 29 | Aug 8 2028 |
| 30 | Aug 9 2028 |
| 31 | Aug 10 2028 |
| Bred | Due |
|---|---|
| 1 | Aug 11 2028 |
| 2 | Aug 12 2028 |
| 3 | Aug 13 2028 |
| 4 | Aug 14 2028 |
| 5 | Aug 15 2028 |
| 6 | Aug 16 2028 |
| 7 | Aug 17 2028 |
| 8 | Aug 18 2028 |
| 9 | Aug 19 2028 |
| 10 | Aug 20 2028 |
| 11 | Aug 21 2028 |
| 12 | Aug 22 2028 |
| 13 | Aug 23 2028 |
| 14 | Aug 24 2028 |
| 15 | Aug 25 2028 |
| 16 | Aug 26 2028 |
| 17 | Aug 27 2028 |
| 18 | Aug 28 2028 |
| 19 | Aug 29 2028 |
| 20 | Aug 30 2028 |
| 21 | Aug 31 2028 |
| 22 | Sep 1 2028 |
| 23 | Sep 2 2028 |
| 24 | Sep 3 2028 |
| 25 | Sep 4 2028 |
| 26 | Sep 5 2028 |
| 27 | Sep 6 2028 |
| 28 | Sep 7 2028 |
| 29 | Sep 8 2028 |
| 30 | Sep 9 2028 |
| Bred | Due |
|---|---|
| 1 | Sep 10 2028 |
| 2 | Sep 11 2028 |
| 3 | Sep 12 2028 |
| 4 | Sep 13 2028 |
| 5 | Sep 14 2028 |
| 6 | Sep 15 2028 |
| 7 | Sep 16 2028 |
| 8 | Sep 17 2028 |
| 9 | Sep 18 2028 |
| 10 | Sep 19 2028 |
| 11 | Sep 20 2028 |
| 12 | Sep 21 2028 |
| 13 | Sep 22 2028 |
| 14 | Sep 23 2028 |
| 15 | Sep 24 2028 |
| 16 | Sep 25 2028 |
| 17 | Sep 26 2028 |
| 18 | Sep 27 2028 |
| 19 | Sep 28 2028 |
| 20 | Sep 29 2028 |
| 21 | Sep 30 2028 |
| 22 | Oct 1 2028 |
| 23 | Oct 2 2028 |
| 24 | Oct 3 2028 |
| 25 | Oct 4 2028 |
| 26 | Oct 5 2028 |
| 27 | Oct 6 2028 |
| 28 | Oct 7 2028 |
| 29 | Oct 8 2028 |
| 30 | Oct 9 2028 |
| 31 | Oct 10 2028 |
| Bred | Due |
|---|---|
| 1 | Oct 11 2028 |
| 2 | Oct 12 2028 |
| 3 | Oct 13 2028 |
| 4 | Oct 14 2028 |
| 5 | Oct 15 2028 |
| 6 | Oct 16 2028 |
| 7 | Oct 17 2028 |
| 8 | Oct 18 2028 |
| 9 | Oct 19 2028 |
| 10 | Oct 20 2028 |
| 11 | Oct 21 2028 |
| 12 | Oct 22 2028 |
| 13 | Oct 23 2028 |
| 14 | Oct 24 2028 |
| 15 | Oct 25 2028 |
| 16 | Oct 26 2028 |
| 17 | Oct 27 2028 |
| 18 | Oct 28 2028 |
| 19 | Oct 29 2028 |
| 20 | Oct 30 2028 |
| 21 | Oct 31 2028 |
| 22 | Nov 1 2028 |
| 23 | Nov 2 2028 |
| 24 | Nov 3 2028 |
| 25 | Nov 4 2028 |
| 26 | Nov 5 2028 |
| 27 | Nov 6 2028 |
| 28 | Nov 7 2028 |
| 29 | Nov 8 2028 |
| 30 | Nov 9 2028 |
| Bred | Due |
|---|---|
| 1 | Nov 10 2028 |
| 2 | Nov 11 2028 |
| 3 | Nov 12 2028 |
| 4 | Nov 13 2028 |
| 5 | Nov 14 2028 |
| 6 | Nov 15 2028 |
| 7 | Nov 16 2028 |
| 8 | Nov 17 2028 |
| 9 | Nov 18 2028 |
| 10 | Nov 19 2028 |
| 11 | Nov 20 2028 |
| 12 | Nov 21 2028 |
| 13 | Nov 22 2028 |
| 14 | Nov 23 2028 |
| 15 | Nov 24 2028 |
| 16 | Nov 25 2028 |
| 17 | Nov 26 2028 |
| 18 | Nov 27 2028 |
| 19 | Nov 28 2028 |
| 20 | Nov 29 2028 |
| 21 | Nov 30 2028 |
| 22 | Dec 1 2028 |
| 23 | Dec 2 2028 |
| 24 | Dec 3 2028 |
| 25 | Dec 4 2028 |
| 26 | Dec 5 2028 |
| 27 | Dec 6 2028 |
| 28 | Dec 7 2028 |
| 29 | Dec 8 2028 |
| 30 | Dec 9 2028 |
| 31 | Dec 10 2028 |
Frequently Asked Questions
How long is an alpaca pregnant?
An alpaca is pregnant for 345 days on average, which is 49 weeks and 2 days, or about 11 months. The normal range is 335 to 355 days. Use the alpaca gestation calculator for your animal’s date.
How many days is the pregnancy of an alpaca?
The average is 345 days. The shortest normal pregnancy is 335 days and the longest is 355 days, a spread of 20 days.
How do I calculate the due date?
Add 345 days to the mating date. An alpaca with a mating date of 1 March 2026 is due on 9 February 2027, within a range from 30 January 2027 to 19 February 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 335 and day 355. A veterinarian can give a more precise date for your animal.
How many young does an alpaca have?
Each birth produces 1 cria.
What are the key dates in the pregnancy?
The calculator dates 7 milestones: day 14, spit-off test: an open female sits for the male, a pregnant one spits; day 45, ultrasound or progesterone test confirms the pregnancy; day 90, recheck — early embryo loss is common in alpacas; day 240, clostridial booster so the cria gets antibodies via colostrum; day 300, shear or crutch her and lift the ration for the final growth phase; day 335, earliest normal birthing — start morning checks; day 345, expected birthing (unpacking). The timeline table above lists each one.
When is the expected birthing date?
The expected birthing date is day 345, which is 49 weeks and 2 days, or about 11 months after the mating date.
How does the pregnancy compare with other animals?
At 345 days the alpaca 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 birthing, and contact a veterinarian immediately in an emergency.
Find Your Alpaca’s Due Date Now
Enter the mating date and receive the birthing date, the 335–355 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.