Mare Gestation Calculator

What Is the Average Horse Gestation Length?

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Why Use a Mare Gestation Calculator?

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How It Works

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Mare Gestation Calculator

What Is the Average Horse Gestation Length?

Horse gestation lasts between 320 and 370 days.

Most mares foal within 330 to 345 days after successful breeding.

Why Use a Mare Gestation Calculator?

Get a clear estimate for your mare’s foaling day.

Just enter the breeding date — let the tool do the math.

How It Works

The calculator predicts an estimated foaling date (usually around 340 days later).