Horse Gestation Calculator

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

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

Below: A mare hangs her neck over her foal.

To Calculate Horse Gestation:

• Type the date the mare was exposed in mm/dd/yy format.
  Do put in the slashes ( / ) but don't use dashes ( - ).
• Type the number of days of gestation you would like to calculate.
• Click the "Estimate Date Of Birth" button.
• The estimated due date is now shown!

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Common Gestation Periods (in days)