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Gestation calculator

Enter the mating date, read off the lambing date.

The gestation calculator for sheep, goats, cattle and pigs. For cattle it uses the gestation length of the individual breed, not one average for all of them.

Species

Basis: sheep 147, goats 150, pigs 115 days. For cattle the breed values from the Swissgenetics checklist «Trächtigkeitsdauer» after Bleul 2008, and the 285-day average when no breed is chosen. These are the same values Herdy computes with on the holding.

Expected due date

Friday, January 29, 2027

147 days of gestation for sheep.

A guide value. The birth can happen a few days earlier or later.

On the holding

Calculating one date is one thing. You have several hundred.

This calculator answers the question for one animal. In Herdy you record the mating once, and from then on the date is there for every dam without you recalculating it.

  • Record the mating once, the due date is there for every dam
  • The list shows which animals are due this week
  • At birth record lambs and ear tags, the birth report goes to the TVD
  • The same entries produce the pedigree and the lambing rate
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Common questions about gestation length

Around 147 days, about five months. There is variation of a few days between breeds and between individual animals; the calculator gives the guide value Herdy also plans with on the holding.