Dog Pregnancy Calculator
Quick facts
| Typical length | ~63 days |
|---|---|
| Normal window | 58–68 days |
| Progesterone dating | ~63 ±2 days from ovulation |
| Ultrasound confirm | ~Day 25+ |
| X-ray count pups | ~Day 45+ |
| Pre-labor sign | ~1°C (1.8°F) temp drop |
How to calculate dog pregnancy
Most dogs whelp about 63 days after mating, with a normal range of 58–68 days. Enter the mating date to see the most likely due date, the earliest and latest expected dates, and a live countdown. If you know the ovulation or progesterone test date, select the refined method for tighter timing.
Dog due date, labor & pregnancy stages
Early (Weeks 1–3)
- Fertilization; embryos travel to the uterus and implant around days 19–21.
- Subtle signs only; mild appetite or behavior changes are possible.
Middle (Weeks 4–6)
- Belly and nipples begin to enlarge; appetite often increases.
- Ultrasound can confirm fetal heartbeats around day 25–28.
Final (Weeks 7–9)
- Nesting behavior; appetite may dip just before whelping.
- Rectal temperature often drops by ~1°C within 24 hours of labor.
Active labor is typically 6–12 hours (longer for first-time moms). If strong contractions last more than 2 hours without a puppy, or if green discharge appears before the first puppy, contact a veterinarian immediately.
The puppy’s well-being
- Nutrition: High-quality, energy-dense food; increase calories in late pregnancy and during lactation.
- Environment: Prepare a quiet, warm whelping box at least a week before the due date.
- Monitoring: Weigh pups daily; healthy puppies gain weight consistently from day 2 onward.
- Milestones: Eyes open ~10–14 days; ears open ~2–3 weeks; deworming per vet guidance.
FAQ
How many puppies can my dog have?
Litter size varies by breed and size. Toy breeds may have 1–4 puppies; large breeds often have 8–12 or more. Age, health, and genetics also matter.
Can I calculate the due date without tests?
Yes. Count about 63 days from mating and consider the 58–68 day window. Tests refine timing but aren’t required for planning.
When should I see a vet?
See a vet to confirm pregnancy, discuss nutrition, and plan whelping. During labor, seek help if strong contractions last >2 hours without a puppy or if unusual discharge occurs.
Is a temperature drop normal?
Often yes—many bitches show a ~1°C (1.8°F) drop within 24 hours before whelping. Track temperatures twice daily in late pregnancy.
Disclaimer: This calculator is for educational purposes only and does not replace veterinary diagnosis or care.
Last updated: