How long are dogs pregnant?
Dog pregnancy (gestation) lasts about 63 days on average — a normal range of roughly 58 to 68 days from mating. Because conception does not always happen on the day of mating, the due date is best treated as a window rather than a single guaranteed day.
Week-by-week timeline
Fertilisation and the embryos travelling to the uterus. Few outward signs yet; carry on as normal.
A vet can often confirm pregnancy by ultrasound from around day 25–30. Appetite may dip briefly, then climb.
The belly rounds out, nipples enlarge, and the puppies’ skeletons begin to form (an X-ray from ~day 45 can count them).
Nesting begins and milk may appear. A drop in body temperature usually signals labour within about 24 hours.
Always work with your vet through a pregnancy and whelping — they can confirm dates, count puppies, and flag any complications early. This tool is a guide, not medical advice.
Getting ready for the litter? Our new puppy checklist and safety checker help once the puppies arrive.
Frequently asked questions
How long are dogs pregnant?
Dogs are pregnant for about 63 days on average, though a normal range is roughly 58 to 68 days from mating. Exact timing depends on when ovulation and fertilisation actually occurred.
How accurate is a dog due-date calculator?
It gives a strong estimate based on the mating date, but the true date can shift within the 58–68 day window because conception may not happen on the day of mating. Your vet can confirm timing with ultrasound and later an X-ray.
How can I tell if my dog is pregnant?
A vet can confirm pregnancy by ultrasound from around day 25, and by X-ray later on. Early signs can include a change in appetite, enlarged nipples, a rounder belly, and calmer or nesting behaviour.