Dog Whelping Calculator

Here is a simple dog whelping calculator to help you earmark the expected delivery date for your bitch.

Simply input the date of her last known mating (format is month/day/year), click “calculate” and the dog whelping calculator will work out the estimated whelping date for you.


Input the last mating date:(mm/dd/yyyy)
Estimated Whelping Date

Dog semen can remain viable for up to 5 days inside the bitch’s body.  Accordingly, the actual date of conception can be days later than the effective mating day.  So while the normal length of the canine pregnancy is 63 days, day 1 is not easy to pinpoint without hormonal assays.

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