Dog Pregnancy Calculator
Enter the breeding date to get due date, delivery window, and key pregnancy milestones.
Pregnancy Timeline
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Request a ToolHow to Use the Dog Pregnancy Calculator
Enter the date of breeding to calculate your dog's expected due date and see a complete pregnancy timeline. Here is what the results mean:
- Enter the breeding date. Use the date of mating or artificial insemination. If the dog was bred on multiple days, use the first date for the earliest possible due date, or the middle date for the most likely due date.
- Read the delivery window. Canine gestation is 58 to 68 days, with 63 days being the average. Most dogs deliver between days 60 and 66. Delivery before day 58 is premature and requires immediate veterinary care.
- Use the milestone timeline. The timeline shows when to schedule ultrasounds, when an x-ray becomes useful for counting puppies, and when to set up the whelping box.
Use Share to send the due date to your vet or a co-breeder. Use Copy to save the date to your notes.
About Canine Gestation
Dog gestation averages 63 days from the date of ovulation, not always the date of mating. Because sperm can survive in the reproductive tract for up to 7 days and ovulation timing varies, the actual birth can range from 58 to 68 days after the breeding date. For precision timing, progesterone testing can pinpoint ovulation and give a tighter due date window.
Pregnancy becomes detectable by palpation around day 25-30, and a veterinary ultrasound at day 25-28 can confirm pregnancy and estimate litter size, though counts are not always accurate at this stage. An x-ray at day 45 or later provides a more accurate puppy count because the skeletal system is developed enough to be visible. The whelping box should be set up and introduced to the mother at least two weeks before the due date so she becomes comfortable with it.
Frequently Asked Questions
How long is a dog pregnant?
Dogs are pregnant for approximately 63 days from the date of ovulation, though delivery can occur anywhere from 58 to 68 days after mating. The exact duration varies because sperm can survive in the reproductive tract for several days after mating, meaning ovulation may not have occurred on the breeding date. Most dogs deliver between days 60 and 66 when counted from breeding.
When can a dog pregnancy be confirmed by ultrasound?
A veterinary ultrasound can detect fetal heartbeats and confirm pregnancy as early as day 25 after breeding. At this stage, the vet can usually confirm whether the dog is pregnant but puppy counts are often inaccurate because embryos can overlap. For an accurate puppy count, an x-ray at day 45 or later is more reliable because the skeletons are developed enough to be counted individually.
What are signs a dog is going into labor?
Signs that labor is approaching or beginning include: nesting behavior (pawing at bedding, seeking a quiet space), a drop in rectal temperature below 100°F (normal is 101-102.5°F) within 24 hours of delivery, restlessness and panting, loss of appetite, and visible abdominal contractions. Active labor with strong contractions should produce a puppy within 30-60 minutes. If more than 2 hours pass between puppies with active straining, contact your vet immediately.
When should I contact a vet during dog pregnancy?
Contact your vet immediately if: the dog has not delivered by day 68; more than 2 hours pass between puppies during active labor; the dog has been in active labor for more than 30 minutes with no puppy; you see green or black discharge before the first puppy is born; or the mother seems severely distressed. Schedule a prenatal vet exam around day 30-35 to confirm the pregnancy, discuss nutrition and exercise, and plan for any special needs during delivery.