Sheep Gestation Calculator
Enter the breeding date to estimate when a ewe is due to lamb. The default uses an average sheep gestation of about 147 days and shows the commonly reported range. Treat this as a planning estimate, not a guarantee.
Last updated: September 25, 2026
Frequently asked questions
How long are sheep pregnant?
About 147 days on average, roughly 5 months. Lambing is commonly reported between about 144 and 151 days after breeding.
Does litter size affect lambing timing?
Ewes carrying twins or triplets often lamb a little earlier than those carrying a single lamb, though individual variation still applies.
How is this different from the Goat Gestation Calculator?
Sheep and goats have similar but distinct gestation lengths - about 147 days for sheep versus about 150 days for goats - so each tool uses its own species-specific default and range.
How is this different from the Cow Gestation Calculator?
Cattle gestation, at about 283 days, is roughly twice as long as sheep gestation, so this tool uses a very different default and range appropriate to sheep.
What if the ewe was exposed to a ram for an extended period?
Then the exact breeding date is uncertain. Use the earliest and latest possible exposure dates to estimate a range of possible lambing dates.
When should I prepare for lambing?
Many shepherds start close observation and preparation a week or so before the estimated date, since actual timing varies within the normal range. Consult a veterinarian or experienced shepherd for guidance specific to your flock.