Pets · Dogs

Canine Pregnancy Calculator

Count 63 days from the mating date to estimate your dog’s due date, then follow the pregnancy week by week with the milestones that matter for whelping prep.

First mating date

Breed size

Canine gestation runs 58–68 days from ovulation; 63 is the standard. Small breeds often whelp a day or two earlier, giant breeds a day or two later. If you have progesterone-testing dates, use those instead of a guessed mating day.

Estimated due date

whelping window shown in stats—

Mating dayWhelping

Days pregnant

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Pregnancy week

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Days to go

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Earliest

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day 58

Latest

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day 68

Gestation math

Due date = mating date + 63 days (±5)

Because sperm can survive several days and eggs are only fertilised mid-oestrus, the exact conception moment is uncertain — that is why the 58–68 day window exists. The calculator counts from the date you enter and flags when a vet check is sensible (ultrasound ~day 25–30, X-ray count from day 45).

🐥 Due date + window

See the exact 63-day estimate plus the realistic 58–68 day whelping band.

📈 Live progress

A progress bar tracks the pregnancy and tells you the current week.

📚 Week-by-week guide

Each week’s development milestone, so you know when to scan, feed more and build a whelping box.

💪 Breed-size aware

Adjusts the standard 63 days for small, large and giant breeds.

Planning the puppy budget

Vet visits and supplies add up — plan the costs alongside the countdown.

Salary Calculator