Dog Pregnancy Calculator
Calculate your dog's due date and get a week-by-week pregnancy timeline. Track important milestones from conception to whelping.
When was the breeding?
Enter the mating date to calculate her due date.
Dog Pregnancy Timeline
Weeks 1-3
Fertilization and implantation. Few visible signs. Maintain normal routine.
Weeks 4-6
Embryos develop. Vet can confirm pregnancy. Morning sickness possible.
Weeks 7-9
Puppies fully formed. Nesting begins. Prepare whelping box.
The Real Timeline of Dog Pregnancy
So your dog is expecting! Unlike humans who have nine months to prepare, dogs are on a fast track. A standard canine pregnancy lasts roughly 63 days from conception. But don't panic if she delivers a few days early or late. Anywhere between 58 and 68 days is completely normal.
Because the timeline moves so incredibly fast, the first few weeks often slip by completely unnoticed. By the time most people realize their dog is pregnant—usually due to a swelling belly or changes in appetite—she is already halfway to her due date. The most definitive way to confirm things? Book an ultrasound between days 25 and 30. Your vet can give you a concrete yes or no, and once you hit day 45, a quick X-ray will tell you exactly how many puppies are hiding in there.
How to Feed an Expecting Mother
If you think a pregnant dog needs to eat double her normal food right away, you're not alone. It's a massive misconception. During the first month, her babies are tiny. They don't need extra calories yet. If you overfeed her now, she'll just gain fat, which actually makes labor much more difficult and dangerous.
The real shift happens around week five. That's when you want to start bumping up her meals by about 10% each week. By the time she reaches her final week, she should be eating roughly 25% to 50% more than usual. This is also the perfect time to transition her to a high-quality puppy food. Puppy formulas pack the extra protein and calcium she desperately needs for milk production. Use our dog calorie calculator to figure out the exact numbers.
Red Flags: When to Call the Vet
Emergency Signs
- X Green or black discharge before labor starts
- X Pushing hard for 30 minutes with no puppy
- X Waiting over 2 hours between puppies
- X Temperature drops below 98°F but no labor after 24 hours
Watch Closely
- ! Refusing to eat for more than a full day
- ! Throwing up constantly (beyond mild morning sickness)
- ! Looking extremely exhausted or depressed for days
- ! Mammary glands feeling hot, hard, or painful
Breed Size Changes Everything
If you're wondering how many puppies to expect, look at the size of the mom. A tiny Chihuahua might only pop out one or two puppies. A giant Great Dane? You could be looking at a dozen. First-time moms also tend to have slightly smaller litters than veteran moms. And if you own a breed with a flat face and broad shoulders like an English Bulldog or Frenchie, you need to have a serious talk with your vet. Those breeds almost always require a planned C-section because the puppies' heads are simply too large for a natural birth.
A Quick Note From Us
We built this calculator using the standard 63 day canine gestation period, but remember that a healthy pregnancy can range anywhere from 58 to 68 days. This tool is meant to help you prepare your whelping box and anticipate key milestones, but it should never replace professional veterinary care. Regular vet check ups, ultrasounds, and x-rays are absolutely critical for a safe and healthy delivery.
Frequently Asked Questions
How long is a dog pregnant?
Dog pregnancy (gestation) lasts approximately 63 days or about 9 weeks from the date of conception. However, it can range from 58 to 68 days depending on the breed and individual dog.
What are the signs of dog pregnancy?
Early signs include decreased appetite, nipple enlargement, and behavioral changes around 2-3 weeks. Later signs include weight gain, enlarged abdomen, nesting behavior, and increased appetite in the final weeks.
When can I confirm my dog is pregnant?
A veterinarian can confirm pregnancy via ultrasound around 25-30 days after breeding, or through abdominal palpation at 28-35 days. Blood tests can detect pregnancy hormones after day 25.
How many puppies will my dog have?
Litter size varies by breed. Small breeds typically have 1-4 puppies, medium breeds 4-8, and large breeds 8-12 or more. Your vet can estimate litter size via X-ray after day 45.
What should I feed my pregnant dog?
During the first 5 weeks, maintain her regular diet. In the last 4 weeks, gradually switch to high-quality puppy food and increase portions by 25-50%. Fresh dog food subscriptions often offer pregnancy-specific nutrition.
When should I prepare a whelping box?
Set up a whelping box 1-2 weeks before the due date (around day 50-55). Choose a quiet, warm location and let your dog get comfortable with it before labor begins.