How long are sheep pregnant?

The average sheep gestation period is roughly 147 days, or about 5 months.

What is a lambing window?

Since ewes can lamb slightly early or late, a ±7 day window provides a safer range for preparation.

Yes. Breed, number of lambs carrying, and age can affect the exact day.

Take the day the ram was introduced (or observed mating) and add 147 days.

Yes, some breeds like Finnsheep may lamb around 142 days, while heavier meat breeds may go closer to 150 days.

Lambing Date Calculator

Enter a breeding or exposure date to estimate the expected lambing date, likely lambing window, supply preparation date and close-watch start.

Adjust the gestation and preparation assumptions if your flock uses different planning rules.

Expected lambing-

Likely window-

Prepare supplies-

Start close watch-

This is a planning estimate. Actual lambing records should be updated from the ewe and lamb cards.

Use the result to prepare supplies, increase observation and record the actual outcome when lambing happens.

Use the preparation date to check bedding, tags, iodine, notes, colostrum plan and basic lambing supplies.

Use the close-watch date to review previous lambing notes, current condition and follow-up needs.

Expected dates should become actual lambing records with lamb count, sex, tags, problems and follow-up notes.