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Pet Pregnancy & Due Date Calculator

Plan your breeding program: estimate due date for dogs (63 days gestation) and cats (65 days). Get pregnancy stages, weekly progress, and prenatal care recommendations.

Date of natural mating or artificial insemination.
Mating Date
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Due Date (Whelping/Queening)
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Current Week of Pregnancy
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Early (0-3 wk)Mid (4-6 wk)Late (7-9 wk)
🐾 Pregnancy Stage & Care Recommendations
Enter dates to see stage-specific advice.

Canine & Feline Gestation: What Breeders Should Know

Dogs typically have a gestation period of 58–68 days, with an average of 63 days from mating. Cats average 65 days (range 60–70). Our calculator uses the standard averages to estimate due dates. Accurate dating helps prepare for whelping (dogs) or queening (cats), schedule prenatal vet visits, and optimize nutrition. Use the backward mode if you have a confirmed due date from ultrasound and want to estimate the breeding window.

Pregnancy is divided into three stages: Early (weeks 1-3) – implantation; Mid (weeks 4-6) – fetal development; Late (week 7 to term) – rapid growth and preparation for birth. Each stage requires specific care: high-quality diet, exercise moderation, and vet checkups.

How We Calculate

  • Dog Due Date = Mating Date + 63 days
  • Cat Due Date = Mating Date + 65 days
  • Reverse calculation: Mating Date = Due Date - gestation days
  • Current week = (days since mating) / 7, clamped between 0 and gestation weeks.
  • Stage: Early (≀21 days), Mid (22-42 days), Late (>42 days).

Note: These are estimates. Individual variation exists. Always confirm pregnancy via palpation, ultrasound, or relaxin test around day 25-30.

Frequently Asked Questions

❓ Can I use this calculator for other pets like rabbits?

Rabbit gestation is ~31 days. This tool focuses on dogs and cats, but you can adapt by selecting the closest species and adjusting manually. We recommend species-specific calculators for other animals.

❓ What if I don't know the exact mating date?

Use the backward mode with a vet-provided due date. Alternatively, estimate the range based on observed mating behavior.

❓ When should I take my pregnant dog/cat to the vet?

Confirm pregnancy at day 25-30. Schedule a prenatal checkup at week 4-5. For late pregnancy (week 7+), have an emergency plan.

❓ How can I tell if my pet is in labor?

Signs include nesting, drop in body temperature (dogs), restlessness, and visible contractions. Prepare a whelping box 1 week before due date.