Dog Due Date Calculator
Calculate your dog’s whelping due date
First Mating Date
Breed Size
Dog Due Date Calculator: Planning for Puppies
Dog pregnancy lasts approximately 63 days from mating. Our dog due date calculator gives you an estimated whelping date plus a milestone timeline so you know exactly what to prepare for at each stage.
Key Pregnancy Milestones
| Day | Milestone | Action |
|---|---|---|
| Day 21-28 | Embryo attachment | Vet ultrasound confirmation |
| Day 42-45 | Rapid fetal growth | Increase to puppy food |
| Day 50 | Skeletons calcified | X-ray to count puppies |
| Day 57+ | Whelping preparation | Set up whelping box, monitor temp |
| Day 63 | Birth expected | Vet on standby; have supplies ready |
FAQs
How do I know when my dog is due?
The most accurate method is a progesterone test during breeding to identify ovulation, then count 63 days. Without this, count 63 days from first mating as an estimate. An ultrasound at day 28 can give a more refined timeline.
What are signs a dog is about to give birth?
Temperature drops below 100°F (normal is 101-102.5°F), nesting behavior, loss of appetite, restlessness, and vaginal discharge. Birth typically follows within 12-24 hours of the temperature drop.
Conclusion
Our dog due date calculator keeps you prepared at every stage of your dog’s pregnancy. For nutrition support, use our dog calorie calculator set to pregnant. After birth, our dog age calculator helps track puppy development milestones.