Mare Gestation Calculator

Use our mare gestation calculator to determine your mares due date.

Smart Foal is committed to providing as much care and information as possible to our customers and anyone else who cares for their horsey friends. A part of our commitment is providing our own foaling calculator. Knowing your mares approximate foaling date is vital! If she starts showing signs of foaling early it could indicate placentitis or another problem.

The average length of a mares gestation is 320 – 360 days.

Use our foaling calculator below to get the date 340 days from her last service/or the date she ovulated.

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