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Cat Gestation Calculator

Cat pregnancy averages 65 days in this calculator. Enter the mating date to estimate the kitten due date and planning window.

Estimation Method

Cat gestation at a glance

Average used by this calculator65 days (about 9.3 weeks)
Window shown by this calculator63 to 67 days after breeding
Due date formulaBreeding date + 65 days
Birth is calledQueening
FemaleQueen
MaleTom

Merck says pregnancy lasts 60 to 65 days and reports delivery typically 64 to 66 days after breeding; be ready from about day 60. The calculator shows a broader 63 to 67 day planning window around its 65 day figure, not a sourced typical interval.

Cat pregnancy and birth timeline

Days 21 to 30A veterinarian can detect pregnancy by palpation or ultrasound.
After day 55X-rays can help determine the number of kittens.
Stage one of laborHiding, restlessness and nesting may occur.
Stage two of laborVisible abdominal contractions accompany kitten delivery.

Frequently asked questions

How long is a cat pregnant?

The cat calculator uses 65 days after mating, matching Merck's gestation table. Merck owner guidance says pregnancy lasts 60 to 65 days and delivery typically falls 64 to 66 days after breeding.

How do I calculate a cat due date?

Enter the mating date and the cat calculator adds 65 days for the estimated kitten due date, then shows its planning window.

What signs show a queen is in labor?

A queen may hide, become restless, build a nest, vomit, tremble or refuse food during the first stage of labor.

When should I call a veterinarian during cat labor?

Call your veterinarian right away if a kitten is stuck partway out with its head still inside; Merck says it must be delivered within 10 to 20 minutes or it will die. Merck's other signs of a difficult birth that need a veterinarian are strong contractions for more than 1 to 2 hours without a kitten, a pause over 4 to 6 hours, obvious pain or illness in the mother, fresh blood or dark green discharge before the first kitten, or no kitten within 24 hours after rectal temperature falls below 100 degrees F.

Sources

Reviewed by Elliott Garber, DVM · Last reviewed