Dog Pregnancy Calculator

Easily calculate your dog's due date and track pregnancy week by week

Accurate 63-Day Calculation
Week-by-Week Tracking

Calculate Due Date

Select the date your dog mated

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What is a Dog Pregnancy Calculator?

A dog pregnancy calculator is a simple online tool that helps pet owners and breeders estimate their dog's due date based on the mating date. Dogs have an average gestation period of 63 days (approximately 9 weeks), though this can vary between 58-68 days depending on breed, size, and individual health factors.

This calculator takes the guesswork out of pregnancy tracking by providing you with an accurate expected due date, current pregnancy week, and progress percentage. Understanding these timelines is crucial for proper prenatal care, scheduling veterinary appointments, and preparing for the arrival of puppies. Whether you're a first-time dog parent or an experienced breeder, this tool helps you stay organized and ensure your dog receives the best care throughout her pregnancy journey.

How to Use the Calculator

Using our dog pregnancy calculator is simple and straightforward. Follow these easy steps to calculate your dog's due date and track her pregnancy progress:

  • Enter the mating date in the date field above. If you don't know the exact date, use the first possible mating date for a conservative estimate.
  • Click the "Calculate Due Date" button to instantly see your dog's expected delivery date, current pregnancy week, and progress percentage.
  • Use the results to plan vet appointments, prepare your whelping box, and track your dog's pregnancy journey week by week.

Dog Pregnancy Stages (Week by Week)

1-3

Weeks 1-3: Conception & Early Development

Fertilization occurs and embryos implant into the uterine lining. Your dog may show minimal visible changes, though some experience morning sickness around week 3. Nipples may begin to enlarge and become pinker. This is a critical period for embryo development, so maintain normal diet and avoid unnecessary medications.

4-5

Weeks 4-5: Organ Formation & Fetal Growth

Week 4 is the most critical developmental period when organs, eyes, and spine begin forming. By week 5, embryos become fetuses with individual toes, nails, and whiskers developing. Your dog's weight increases noticeably. A veterinarian can confirm pregnancy via ultrasound around day 28, and you should begin increasing food portions.

6-7

Weeks 6-7: Rapid Growth & Preparation

Puppies gain 75% more weight during this period. The skeleton solidifies and skin color develops. Your dog's belly becomes obviously larger, teats darken, and she may start nesting. Switch to high-quality puppy food and feed smaller, more frequent meals. Provide a whelping box and schedule a vet checkup.

8-9

Weeks 8-9: Final Stage & Birth Preparation

Puppies are fully developed by day 58 and move into birthing position. Lactation begins with milk production visible. Your dog becomes restless, pants excessively, and seeks solitude. Take her temperature 3 times daily—a drop of a few degrees indicates labor will begin within 24 hours. Keep your vet on call for delivery support.

Signs of Dog Pregnancy

Recognizing the signs of dog pregnancy early helps you provide proper care and prepare for the arrival of puppies. Here are the most common symptoms to watch for throughout your dog's pregnancy:

Behavioral Changes

Increased affection or seeking solitude, decreased energy and more napping, changes in activity levels, and seeking quiet spaces for nesting in later stages.

Physical Symptoms

Enlarged and darker nipples (especially near hind legs), abdominal swelling after week 4, weight gain, clear vaginal discharge, and visible fetal movement in final weeks.

Appetite Changes

Morning sickness and vomiting during weeks 3-4, fluctuating appetite throughout pregnancy, increased hunger in mid-to-late stages, and possible appetite decrease right before labor.

Nesting Behavior

Seeking quiet, enclosed spaces, shredding bedding or blankets, restlessness and pacing, and preparing a comfortable area for delivery starting around week 7.

Care Tips During Pregnancy

Nutrition and Diet

Switch to high-quality puppy food around week 4-6 with at least 28% protein and 17% fat. Gradually increase food intake by up to 50% by delivery time. Feed smaller, more frequent meals in late pregnancy as belly space becomes limited. Ensure fresh water is always available for proper milk production.

Supplements and Vitamins

If feeding a complete commercial diet, additional supplements are usually unnecessary and can be harmful. Only use vet-prescribed supplements containing folic acid, iron, omega-3 fatty acids, and calcium. Never over-supplement calcium as it can cause serious complications like eclampsia.

Exercise and Activity

Maintain moderate exercise in early pregnancy with 30-minute daily walks split into two sessions. Avoid high-impact activities like agility or rough play. In the last 3 weeks, switch to gentle, shorter walks and let your dog guide activity levels. Indoor exercise helps avoid parasites and other animals.

Veterinary Care

Schedule an ultrasound around day 21-28 to confirm pregnancy. Plan a checkup around day 45 for X-rays to count puppies. Deworm in the third trimester with vet-approved treatments. Update vaccinations before breeding, and have your vet on call during the final week for delivery support.

Frequently Asked Questions

A dog's pregnancy typically lasts 63 days (approximately 9 weeks or 2 months) from the date of mating. However, the gestation period can range from 58 to 68 days depending on the breed, size, and when fertilization actually occurred. Smaller breeds may deliver slightly earlier (58-61 days), while larger breeds often carry closer to 65-68 days. Contact your vet if pregnancy exceeds 70 days.

Dog pregnancy calculators provide estimates with an accuracy of ±5 days. They calculate based on the standard 63-day gestation period from the mating date, but actual delivery can vary. For more precise timing, combine the calculator estimate with veterinary ultrasounds around day 28 for confirmation. Remember that fertilization may occur 1-2 days after mating, which affects accuracy.

Litter size varies by breed: small breeds typically have 2-3 puppies, medium breeds have 4-8 puppies, and large breeds can have 8-12 or more puppies. Pregnancy calculators cannot predict litter size—only veterinary X-rays around day 45-50 can accurately count puppies by showing their skeletons. Ultrasounds are less accurate for counting due to puppy positioning.

Schedule your first vet visit around day 21-28 for an ultrasound to confirm pregnancy and detect fetal heartbeats. Plan another checkup around day 45 for X-rays to count puppies and assess their development. Additionally, contact your vet immediately if you notice vaginal bleeding, excessive vomiting, appetite loss, lethargy, or if your dog hasn't delivered by day 70.

Key signs of labor include: temperature drop of a few degrees 12-24 hours before delivery (normal is 100.5-102°F), restlessness and pacing, excessive panting, nesting behavior intensifies, loss of appetite, seeking solitude, and possible clear or slightly bloody discharge. Take your dog's temperature 3 times daily in the final week to catch the temperature drop that signals imminent labor.