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Horse Gestation Calculator

Use this horse gestation calculator to find out when your mare's due date!

Note: Links with green underlines are shopping links and will open in a new window

Or, you might prefer to use our handy horse gestation table.

Below: A mare hangs her neck over her foal.

A gray mare and her foal

To Calculate Horse Gestation:


Enter date of exposure in "mm/dd/yy" format:

Number of days of gestation:

Estimated due date:



Common Gestation Periods (in days)

Bison 285
Cat 65
Cow 284
Dog 63
Elephant, Asian 645
Elk 255
Giraffe 425
Goat 150
Goat, Pygmy 145
Horse 340
Mink 45 to 52
Mouse 19
Skunk, Striped 63


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