Dog & Cat Pregnancy Due Date Calculator
Dogs are pregnant for about 63 days and cats about 65, counted from mating — though the real range is wider. Enter the mating date and we’ll estimate the due date plus the earliest-to-latest window, so you know when to have the whelping box ready and when a delay means call the vet.
Estimated due date
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Enter the mating date to estimate the due date.
How to use it
- 1 Choose dog or cat.
- 2 Enter the mating (breeding) date.
- 3 See the estimated due date and the normal earliest-to-latest delivery window.
Why this matters
Knowing the due date helps you prepare the whelping or queening area, line up your vet, and recognise when labour is overdue — going well past the window can be an emergency. Gestation is most accurately measured from ovulation, which a vet can pin down with progesterone testing; counted from mating it averages ~63 days in dogs and ~65 in cats, with normal births spread across a multi-day window.
Frequently asked questions
How long are dogs pregnant?
About 63 days from ovulation, but counted from the mating date the normal range is roughly 58–68 days because sperm can survive several days before fertilisation. A vet can narrow it down with progesterone timing.
How long are cats pregnant?
Around 63–65 days on average, with a normal range of about 61–72 days from mating. Most queens deliver between days 63 and 67.
When should I worry about a late delivery?
If your pet goes past the upper end of the window without going into labour, or shows signs of distress, weak contractions for more than an hour, or a drop in temperature more than 24 hours ago with no puppies, contact your vet right away. This estimate is a guide, not a diagnosis.
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