Llama Gestation Calculator

Add 350 days to breeding date for llama due date.

What it does

Llamas carry long, near eleven and a half months. Herd books quote 350 days as the working average, with 342 to 355 covering most normal births. Singles dominate, with crias standing quickly.

The tool above takes breeding date and returns due date, days, and weeks. The default 2026-01-01 matches the worked example, so the page opens showing Thursday Dec 17 2026. Pick a new date to update all three results.

Due adds 350 days in UTC to dodge daylight saving. Fifty weeks is the same span in weeks. Watch last month for udder, behavior, and vet checks rather than trusting the single day.

Use this for planning pens, watch, and vet coverage. Individual variation, maiden status, and nutrition shift dates. Confirm with ultrasound and hands on checks.

This page shows the rule, one full hand checked example at 2026-01-01, a reference table, and practice checks that run through the tool.

How to use

1. Pick breeding date.
2. Read Due date with weekday.
3. Read 350 days and 50 weeks as the spans.
4. Watch from about two weeks before.
5. Log actual birth to tune herd averages.
6. Confirm with vet checks, not dates alone.

Formula

breeding

Cover date.

350

Average days, range 342-355.

due

Expected birth date.

UTC date math only. Alpacas run similar near 345 days but need their own tool for exact herd tuning.

Worked example

Reference table

Limits

• Average only. Normal spans 342 to 355.
• Singles assumed. Twins need vet plans.
• Date math, not a health check.
• Herd variation beats book averages.

Common mistakes

• Counting 350 as ten months flat.
• Ignoring leap days in long spans.
• Using local midnight instead of UTC near edges.
• Planning coverage for one day only.
• Mixing llama 350 with alpaca 345.

Try it yourself

Quick checks. Answers sit tucked under each question.

Questions

Sources

• USDA National Ag Library
• Iowa State Extension

Related calculators