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Dog pregnancy calculator

Enter the date of the first breeding to see when the puppies are due. If your vet pinpointed ovulation, the date gets more precise.

What do you know?

Enter the date to see when the birth is expected.

Have your vet confirm and follow the pregnancy.

Why only a time window?

The breeding date isn’t the conception date: sperm can survive a week or longer, and the female often breeds before ovulation (Merck, AKC). From the first breeding it is therefore 58 to 72 days. If your vet pinpointed ovulation, it gets more precise: 63 days, plus or minus 1 to 2 (Cornell).

When to call your vet

  • More than 2 hours between puppies (Cornell, AKC).
  • Labor lasting more than 24 hours (AKC, Merck).
  • Green discharge not followed right away by a puppy (Cornell).
  • If the window has passed and labor hasn’t started, call (Merck).

The short answer

Dogs are pregnant for an average of 63 days, counted from ovulation (Cornell). Counted from the first breeding, it’s 58 to 72 days, because breeding and conception don’t have to happen on the same day (Merck). Example: first breeding on November 1, 2026 – the puppies are due between December 29 and January 12, 2027, most likely around January 3.

How we calculate: formulas and sources

Questions

How long are dogs pregnant?

An average of 63 days from ovulation (Cornell). Counted from the first breeding, 58 to 72 days (Merck, AKC).

Why is the due date so uncertain?

Sperm can survive a week or longer, and females often breed before ovulation. It gets more precise when your vet pinpoints ovulation (Merck).

How can I tell labor is coming?

Body temperature usually drops about 8 to 24 hours before delivery (Merck). Ask your vet to show you how to take it.

What should I feed a pregnant dog?

Discuss that with your vet. Portiopet doesn’t calculate amounts for pregnant dogs.

Sources (4)