🐾 Dog Pregnancy Calculator

Enter your dog's mating date to get her estimated due date and a week-by-week guide to what's happening — and what to prepare.

⚕️ This calculator provides estimates based on average canine gestation (63 days). Actual delivery may vary by ±5 days. Always work with your veterinarian for accurate pregnancy monitoring.

How Long Are Dogs Pregnant?

Dog pregnancy (gestation) lasts an average of 63 days from the mating date, though the normal range is 58–68 days. Smaller breeds tend to deliver a little earlier; giant breeds a little later.

The pregnancy is divided into three trimesters of roughly 21 days each. Each trimester brings visible changes — from early behavioral shifts to a noticeably rounded belly by week 5, and active nesting behavior in the final weeks.

Signs Your Dog May Be Pregnant

  • Decreased appetite or mild nausea in weeks 1–3
  • Nipple enlargement and darkening (week 3–4)
  • Increased affection or clinginess
  • Visible belly rounding by week 5
  • Nesting behavior and restlessness in the final week

What to Prepare

Around week 7, set up a whelping box — a quiet, warm, easy-to-clean space where your dog can give birth. Introduce her to it early so she feels comfortable.

Schedule vet checkups at week 4 (ultrasound to confirm pregnancy) and week 7–8 (X-ray to count puppies). Have your vet's emergency number ready for the final week.

Want the full guide? Read: How Long Are Dogs Pregnant? A Complete Week-by-Week Guide →