Sheep Gestation Calculator

Your details

The date the ewe was bred (when she was exposed to the ram or artificially inseminated).
Different breeds have slightly different average gestation lengths. Choose the closest match, or use "Average" if the breed is unknown.
Larger litters tend to arrive 1-2 days earlier. This adjusts the estimated due date slightly.
Estimated lambing dateLambing imminent
8 Aug 2026

The most likely date lambing will occur based on breed and litter size.

Lambing window3 Aug 2026 to 13 Aug 2026
Days remaining0days
Gestation length used147days
Days pregnant today147days
Week of pregnancy21
147 days
  • Breeding
  • Implantation
  • Fetal organs form
  • Rapid fetal growth
  • Shear & vaccinate
  • Prep lambing pen
  • Due date

Today is the estimated lambing date (8 Aug 2026).

  • Estimated lambing date is 8 Aug 2026 (lambing window: 3 Aug 2026 to 13 Aug 2026).
  • Move the ewe to a clean, dry lambing pen. Check her udder for colostrum and monitor for signs of labor (restlessness, pawing, and hollow flanks).

Next stepIf the ewe has not lambed and it has been more than a few days past the window, consult your veterinarian.

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