Dog Pregnancy Calculator
Enter your dog’s mating date and instantly get her due date, week-by-week timeline, trimester tips, and whelping countdown — free for all breeds.
Enter mating information
● Trimester 1
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days pregnant
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days remaining
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due date
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gestation days
Mating day
0% complete
Whelping day
Full pregnancy timeline
Trimester care tips
How to Use the Dog Pregnancy Calculator
Using this dog pregnancy calculator is simple. You only need to know the approximate date your dog mated or was artificially inseminated:
- Enter the mating date — the date of the first confirmed breeding or ovulation.
- Select your breed size — gestation length varies slightly between small, average, large, and giant breeds.
- Click “Calculate” — the tool instantly shows the estimated due date, days remaining, trimester progress, full timeline of milestones, and breed-appropriate care tips.
💡 Pro Tip: For the most accurate results
If you had progesterone testing done to pinpoint ovulation, use the confirmed ovulation date rather than the mating date. Gestation is counted from ovulation, and canine sperm can survive 5–7 days — so the mating date and conception date may differ by a few days.
How Long Is a Dog Pregnant? (Canine Gestation Period)
The average canine gestation period is 63 days from ovulation, but a completely normal and healthy dog pregnancy can range from 58 to 68 days. This variation is normal — what matters most is that veterinary monitoring confirms the pregnancy is progressing well.
The gestation period varies slightly by breed size:
Small Breeds
61
avg. days (58–63)
Average Breeds
63
avg. days (60–65)
Large Breeds
65
avg. days (62–67)
Giant Breeds
67
avg. days (64–68)
⚠️ When to contact your vet immediately:
If your dog has not delivered by day 70, contact your veterinarian right away. A pregnancy extending past 70 days without delivery can indicate a serious complication requiring emergency veterinary care.
Dog Pregnancy Week by Week
Understanding what is happening inside your dog’s body each week helps you provide the right nutrition, veterinary care, and preparation at exactly the right time.
| Week | Days | Puppy Development | Mother’s Changes | Key Actions |
|---|---|---|---|---|
| Week 1 | Days 1–7 | Fertilization occurs. Cells begin dividing into an embryo. | No visible signs. Behavior unchanged. | Keep environment calm. No medications or vaccines. |
| Week 2 | Days 8–14 | Embryos travel to the uterine horns and begin implanting. | Still no visible symptoms. Normal appetite. | Avoid rough play, jumping, and stress. |
| Week 3 | Days 15–21 | Organ development begins. Heartbeats form. | Nipples may enlarge and turn pink. Possible mild morning sickness. | Ultrasound from day 21 can confirm pregnancy. |
| Week 4 | Days 22–28 | Fetuses reach ~1.5cm. Facial features begin forming. | Belly begins to round slightly. Increased affection possible. | Relaxin blood test confirms pregnancy (day 25–30). Vet visit. |
| Week 5 | Days 29–35 | Toes, claws, and whiskers develop. Gender can be determined. | Appetite increases. Clear weight gain becomes visible. | Start transitioning to puppy food. Increase calories 25%. |
| Week 6 | Days 36–42 | Pigmentation develops. Coat begins forming. | Belly significantly enlarged. Mammary glands swell. | Prepare whelping box. Introduce it now so she gets comfortable. |
| Week 7 | Days 43–49 | Puppies are nearly fully formed. Skeletal bones mineralized. | Shedding of belly hair begins. Nesting behavior starts. | X-ray around day 49 gives accurate litter count. Final vet visit. |
| Week 8 | Days 50–56 | Puppies are fully developed and gaining weight. | Milk (colostrum) may appear. Restlessness increases. | Take morning temperature daily. Prepare your whelping kit. |
| Week 9 | Days 57–65 | Puppies are ready for birth. Final positioning in birth canal. | Temperature drops below 37.8°C (100°F) within 24h of labor. | Monitor constantly. Have vet emergency contact ready. Whelping day! |
Signs of Pregnancy in Dogs
Unlike humans, dogs do not show obvious pregnancy signs in the early stages. Here are the signs to look for at each phase:
Early Signs (Weeks 1–3)
- Slightly reduced appetite or mild nausea (similar to morning sickness)
- Nipples become more prominent and may turn slightly pink or darker
- Behavioral changes: more affectionate or slightly withdrawn
- Increased fatigue and sleeping
Mid-Pregnancy Signs (Weeks 4–6)
- Visible belly expansion and weight gain
- Clear or whitish vaginal discharge (normal, not bloody)
- Enlarged mammary glands
- Increased appetite and food motivation
- Fetal movement may be felt from around day 45–50
Late Pregnancy Signs (Weeks 7–9)
- Heavy belly, puppies visible/palpable through abdomen
- Nesting behavior — digging, rearranging bedding, seeking quiet spaces
- Colostrum (pre-milk) may appear from nipples
- Restlessness and panting in the days before labor
- Rectal temperature drop below 37.8°C (100°F) — within 12–24h of labor
Recommended Vet Visit Schedule for Pregnant Dogs
Proper veterinary care is the most important thing you can do during your dog’s pregnancy. Here is the recommended schedule:
| Timing | Procedure | Purpose |
|---|---|---|
| Day 25–30 | Relaxin blood test | Most reliable way to confirm pregnancy (~98% accuracy from day 25) |
| Day 21–28 | Ultrasound | Confirms pregnancy, checks fetal heartbeats, estimates litter size |
| Day 28 | Abdominal palpation | Vet manually feels for uterine swelling — only reliable in this short window |
| Day 49–55 | X-ray (radiograph) | Most accurate puppy count — essential to know if all puppies are delivered |
| Day 58+ | Pre-whelping check | Final health check, review labor signs, discuss emergency protocol |
📋 Important: Know your emergency numbers before whelping day
Normal labor delivers one puppy every 20–60 minutes. If more than 2 hours pass between puppies, your dog is straining without delivering, or she seems in distress — call your vet immediately. Keep your regular vet’s number and an emergency animal clinic number easily accessible from day 55 onward.
Whelping Preparation Checklist
A well-prepared whelping environment dramatically reduces complications and stress for both mother and puppies. Start preparing your whelping kit by day 42–49.
Setting Up the Whelping Box
The whelping box should be large enough for the mother to lie stretched out, with sides tall enough to contain puppies (but low enough for the mother to step over). Line it with clean, washable bedding. Place it in a warm, quiet, draft-free area away from household noise. Temperature inside the box should be 29–32°C (85–90°F) for the first 2 weeks.
Essential Whelping Kit Supplies
- Clean towels — many of them, for drying and stimulating puppies
- Disposable gloves — for hygiene during delivery
- Bulb syringe — to clear fluid from puppies’ airways
- Iodine solution — to disinfect umbilical cords
- Digital thermometer — to monitor mother’s temperature daily from day 58
- Dental floss (unwaxed) — to tie off umbilical cords if needed
- Kitchen scale — to weigh each puppy at birth and track weight gain
- Heating pad or heat lamp — for keeping puppies warm
- Notebook — to record each puppy’s birth time, weight, and color
- Puppy milk replacer — emergency backup if mother cannot nurse
Frequently Asked Questions
A dog’s pregnancy (gestation period) lasts an average of 63 days from the date of ovulation. However, a completely normal canine pregnancy can range from 58 to 68 days. Small breeds tend to deliver slightly earlier (around 61 days), while large and giant breeds may carry up to 65–67 days. Our calculator adjusts the estimate based on your breed size selection.
To manually calculate your dog’s due date, add 63 days to the confirmed mating or ovulation date. For example, if your dog mated on March 1, the estimated due date is approximately May 3. Our free dog pregnancy calculator does this instantly and also generates the full week-by-week milestone timeline.
Early signs of dog pregnancy include enlarged, pink nipples (visible from day 21), reduced appetite or mild nausea (weeks 2–3), increased fatigue, and subtle behavioral changes. From week 4–5, belly enlargement and weight gain become visible. A veterinarian can confirm pregnancy via relaxin blood test from day 25 or ultrasound from day 21.
Yes — a dog can absolutely become pregnant from the first mating during her heat cycle. Success depends on timing (mating must occur within the fertile window, typically days 9–14 of the heat), the health of both dogs, and whether successful mounting occurred. Canine sperm can survive 5–7 days inside the female, so a single mating can result in pregnancy even if it happens slightly before peak ovulation.
Average litter size is 5–6 puppies, but this varies significantly by breed. Small breeds like Chihuahuas commonly have 1–3 puppies, medium breeds like Beagles typically have 5–7, and large breeds like Labrador Retrievers often have 6–10. An X-ray around day 49–55 provides the most accurate litter count before whelping — which is critical so you know when all puppies have been delivered.
For the first 4 weeks, keep her on her regular adult food without major changes. From week 5 onward, gradually transition to a high-quality puppy food that is richer in protein, fat, calcium, and DHA. By the final weeks, increase her total daily food intake by 25–50%. Feed smaller, more frequent meals (3–4x per day) in late pregnancy as growing puppies compress her stomach capacity.
The most reliable sign that whelping is imminent is a rectal temperature drop below 37.8°C (100°F) — this typically occurs 12–24 hours before active labor. Other signs include: intense nesting behavior (digging, rearranging bedding), refusal to eat, restlessness and panting, seeking isolation, and clear or whitish vaginal discharge. Take her temperature twice daily starting day 58.
This calculator provides a reliable estimate based on average canine gestation periods adjusted for breed size. It is accurate as a planning tool, but actual delivery can vary ±3–5 days even in perfectly healthy pregnancies. For the most precise due date, consult your veterinarian — progesterone/LH surge testing is the gold standard for pinpointing ovulation and calculating a precise expected whelping window.
False pregnancy (pseudopregnancy or pseudocyesis) occurs when an unspayed female dog displays physical and behavioral signs of pregnancy — including a swollen belly, milk production, nesting, and even labor-like contractions — without actually being pregnant. It is caused by hormonal fluctuations after a heat cycle and is surprisingly common. It typically resolves on its own in 2–3 weeks, but a vet visit is recommended to rule out complications.
Schedule your first vet visit around day 25–30 for a relaxin blood test or ultrasound to confirm pregnancy. A second visit around day 49–55 for an X-ray is essential to count the number of puppies (critical for safe whelping). Contact your vet immediately if: your dog hasn’t delivered by day 70, labor lasts more than 12 hours without puppies, more than 2 hours pass between puppies, or she shows signs of distress.