🐾 Dog Whelping Date Calculator
Estimate your dog's whelping (birth) date and get a full pregnancy milestone timeline — instantly.
Calculate Whelping Date
📅 Your Results
🗓 Pregnancy Milestone Timeline
About This Dog Whelping Date Calculator
Whether you are a seasoned breeder or a first-time dog owner, knowing exactly when your dog is due to give birth is one of the most important pieces of information you can have. Our Dog Whelping Date Calculator takes the guesswork out of the process by giving you an instant, science-backed estimate of your dog's whelping (birthing) date — along with a complete week-by-week pregnancy milestone timeline.
How Does It Work?
Simply enter the date of your dog's mating (or the date of the LH — Luteinizing Hormone — surge, if you have progesterone test results from your vet). The calculator then applies the standard canine gestation period to project:
- Expected whelping date — the most likely delivery day
- Earliest possible whelping — a full-term birth could occur from day 58
- Latest possible whelping — gestation rarely exceeds day 68
- Full milestone timeline — key developmental and care events across all 9 weeks
Formula Explanation
Expected Whelping Date = Mating Date + 63 days
The average canine gestation period is 63 days from the date of ovulation (which closely aligns with the mating date). This is derived from decades of veterinary research and is consistent across most dog breeds, though smaller or larger breeds may show minor variations. The normal range is 58–68 days, giving a 10-day window for healthy, full-term deliveries.
If progesterone testing has been performed, the LH surge date (Day 0 of ovulation) is the most accurate reference point. Without testing, the first mating date is the best available estimate.
Practical Benefits
Plan veterinary check-ups in advance
Schedule ultrasound scans (day 25–28) and X-rays (day 45+) at the right time.
Prepare the whelping box on time
Set up a safe, warm whelping area well before the due date arrives.
Optimize nutrition and supplementation
Adjust your dog's diet at key pregnancy stages for the healthiest puppies possible.
Know when to call the vet
If your dog goes past day 65 with no signs of labor, you'll know it's time for professional intervention.
Prepare supplies well ahead
Stock up on whelping essentials — towels, heat pads, puppy milk replacer, and more — without last-minute panic.
Frequently Asked Questions
