Expecting puppies or kittens? Knowing roughly when they’ll arrive helps you prepare a safe nesting space, line up vet visits, and adjust your pet’s diet at the right time. Our free pet pregnancy calculator estimates your dog’s or cat’s due date — and maps out the key milestones along the way — in just a couple of clicks.
Pick whether you have a dog or a cat, enter the mating (breeding) date, and you’ll instantly see the estimated due date, the likely delivery window, and a timeline of what to expect: when a vet can confirm the pregnancy, when an x-ray can count the babies, and when to set up a whelping or nesting area. Dogs usually deliver around 63 days after mating and cats around 65, but every pregnancy is a little different — use the result as a helpful guide and confirm the details with your vet.
How the due date is calculated
Pregnancy in dogs and cats is short — usually about nine weeks. Counting from the mating date, dogs typically deliver around day 63 (anywhere from 58 to 68 days) and cats around day 65 (about 63 to 67 days). Because the exact day of conception is hard to pin down, treat the result as a window rather than a fixed date.
The timeline highlights common care milestones — when a vet can confirm the pregnancy, when an x-ray can count the babies, and when to prepare a nesting or whelping area. This is general guidance, not veterinary advice; always confirm with your vet.
Frequently asked questions
How accurate is the due date?
It is an estimate. Gestation length varies with breed, litter size, and the exact timing of conception, which can differ from the mating date. Use the window, and ask your vet for a more precise date from an ultrasound or x-ray.
When can a vet confirm the pregnancy?
A vet can usually confirm pregnancy by ultrasound from around three to four weeks after mating. An x-ray later in the pregnancy can count how many puppies or kittens to expect.
What should I prepare before the birth?
Set up a quiet, warm nesting or whelping area a week or two before the due date, switch to a higher-calorie diet as advised by your vet, and have your vet’s emergency contact ready in case of complications.
