Dog Pregnancy Calculator
Use the ovulation date established with your veterinarian; mating dates are less reliable.
Formula
Estimated due date = ovulation date + 63 calendar days; ovulation is day zero.
Ovulation date = 2026-10-12 · Average interval (fixed at 63 days) = 63
How to use
- Enter the known ovulation date, not a mating date.
- Keep the fixed average interval of 63 days.
- Discuss the estimated date and birth plan with your veterinarian.
Examples
- Ovulation on January 1, 2024 gives an estimated due date of March 4, 2024.
Frequently asked questions
Is the displayed date exact?
No. Cornell describes about 63 days, usually within 1–2 days when ovulation is known. The tool shows the central estimate.
Can I substitute the mating date?
No. Mating may occur before or after ovulation, so this narrow estimate would be misleading. Ask your veterinarian about dating.
Does this confirm pregnancy or tell me when to wait?
No. Seek veterinary care promptly for difficult labor or concerns; do not wait for this date.
Sources
Updated: