Llama Gestation Calculator

Enter your llama's breeding (mating) date to estimate the cria's due date, based on the average 350-day gestation period.

Quick Facts

Method
Due date = breeding date + 350 days
Average llama gestation is ~11.5 months; normal range 335-360 days.

Estimated Due Date

Calculated
Estimated due date
-
Breeding date + gestation length
Earliest expected
-
Breeding date + 335 days
Latest expected
-
Breeding date + 360 days
Days remaining
-
From today to the due date

Ready

Enter the breeding date and run the calculator.

Llama gestation: how the due date is calculated

A llama pregnancy is timed from the day the female (a hembra) is bred. The calculator simply adds the gestation length to that breeding date to estimate when the cria will arrive: due date = breeding date + gestation length in days. The default gestation length is 350 days, the widely cited average for llamas, which works out to about 11.5 months.

Why 350 days

Llamas (Lama glama) carry a single cria per pregnancy and almost never have twins. Reported average gestation clusters around 342 to 350 days depending on the source, with a normal range of roughly 335 to 360 days. This calculator uses 350 days as the default and shows the 335-day and 360-day dates as the earliest- and latest-expected bookends so you can plan a window rather than a single day.

Reference points to remember

  • Average gestation: about 350 days (~11.5 months).
  • Normal range: roughly 335 to 360 days.
  • Litter size: one cria; twinning is very rare and usually risky.
  • Alpacas share nearly the same gestation window, so the same math applies to them.
  • Crias are typically born during daylight hours, most often mid-morning to early afternoon.

Using the estimate on the farm

Because the true length varies by animal, treat the due date as the center of a three-to-four-week window. Watch the hembra closely from about day 335 onward: signs that birth is near include separating from the herd, restlessness, frequent trips to the dung pile, and a full, tight udder. Have a clean, dry, shaded area and a cria-care kit ready before the earliest-expected date rather than the average date.

Frequently Asked Questions

How long is a llama pregnant?
On average about 350 days, roughly 11.5 months, for a single cria. Most healthy births fall between 335 and 360 days after breeding, so the exact day varies from animal to animal.
How is the due date calculated?
The tool adds the gestation length in days (350 by default) to the breeding date. You can change the gestation length to any value in the normal 335-360 day range to see how the estimated arrival date shifts.
Does this work for alpacas too?
Yes. Alpacas are the llama's smaller camelid cousin and share a nearly identical gestation window of about 335 to 360 days, averaging around 350 days, so the same calculation applies.
My llama passed her due date — should I worry?
A few days past the 350-day average is normal; the true length commonly reaches 360 days or slightly beyond. If she is well past 365 days, or shows signs of distress or prolonged labor, contact a camelid-experienced veterinarian.

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