Dog Pregnancy Calculator
Enter the mating date to estimate your dog's due date, see how far along she is, and get a week-by-week timeline.
Your dog's pregnancy dates
Key dates for this pregnancy
| Day | Date | What to expect |
|---|
Estimate only. Dogs can whelp from about day 58 to day 68 after mating. Confirm with your vet.
Dog Pregnancy Week by Week
A dog's pregnancy lasts about nine weeks. Here is what typically happens in each week.
| Week | What happens |
|---|---|
| Week 1 | Fertilization and implantation (about days 1–13). No visible signs. |
| Week 2 | Embryos reach the uterus (days 14–20). Mild appetite changes are possible. |
| Week 3 | Days 21–27. Early pregnancy hormones; some dogs show slight nipple pinking. |
| Week 4 | Days 28–34. A vet ultrasound can confirm pregnancy and detect heartbeats. |
| Week 5 | Days 35–41. Embryos become fetuses; appetite may dip briefly. |
| Week 6 | Days 42–48. Abdomen begins to enlarge; start feeding more calories. |
| Week 7 | Days 49–55. Skeletons mineralize and are visible on X-ray from about day 55. Set up the whelping box. |
| Week 8 | Days 56–62. Mammary glands enlarge and nesting begins. Take her temperature twice a day near the end. |
| Week 9 | Days 63–68. Average due date is day 63. Call your vet if labor has not started by day 68. |
How the dog pregnancy calculator works
The average dog pregnancy lasts about 63 days, counted from ovulation. Because sperm can survive for several days and dogs ovulate over a window, the time from the first mating to birth ranges from about 58 to 68 days. The calculator adds 63 days to the mating date for the expected due date and shows days 58–68 as the normal window. Dates are most accurate when they come from an ovulation or progesterone test, and a vet scan or X-ray can narrow them further.
FAQ
How long is a dog pregnant?
A dog's pregnancy lasts about 63 days from ovulation, or roughly 58 to 68 days from the date of mating. Most litters arrive around day 63.
How do I calculate my dog's due date?
Add 63 days to the mating date. If you only know the first mating date, expect the puppies between day 58 and day 68. Enter the date in the calculator above to see the dates for your dog.
How soon can you tell if a dog is pregnant?
A vet can usually confirm pregnancy with an ultrasound from around day 25 to 35. Blood tests for the hormone relaxin work from about day 28, and X-rays can count puppies from about day 55.
What are the signs of pregnancy in a dog?
Early signs are subtle: mild appetite change, slight nipple enlargement and sometimes a clear discharge. Later signs include a growing belly, weight gain, enlarged mammary glands and nesting behavior.
When should I take my dog's temperature before labor?
Start checking twice a day from about day 62. A drop in rectal temperature to below about 99°F (37.2°C) usually means labor will begin within 24 hours.
What should I feed a pregnant dog?
Keep her normal diet for the first 5–6 weeks, then gradually move to a high-quality puppy or lactation food in the last third of pregnancy as her energy needs rise. Ask your vet about the right amount for her size.
When can a dog give birth safely?
Puppies born from about day 58 after mating usually survive, while those born earlier are at much higher risk. Normal births fall between days 58 and 68.
What if my dog goes past her due date?
Call your vet if she has not gone into labor by day 68 after mating, or sooner if she shows signs of distress, green discharge without puppies, or strong contractions for over an hour without a puppy.
How many puppies will my dog have?
Litter size varies with breed: small breeds average 3–4 puppies, while large breeds can have 8 or more. An X-ray around day 55 gives the most accurate count.
Is this calculator veterinary advice?
No. It gives a general estimate based on typical gestation lengths. Your vet can confirm the pregnancy, estimate dates more accurately and advise on care.
About this tool
This calculator estimates a dog's due date from the mating date. It is a general guide, not veterinary advice. Contact your vet to confirm the pregnancy, plan for the birth and check nutrition, and call them promptly if anything seems wrong.