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Calculator

Cat pregnancy calculator

Estimate your cat’s due date and follow her pregnancy week by week — from implantation to nesting.

If there were several matings, use the first one.

Gestation: 63–67 days on average (range ~58–72). Typical litter: 4–6 kittens (range 1–9). First-time queens often have smaller litters.

Not sure she’s pregnant? A vet can confirm by palpation from about day 21 or ultrasound from about day 15.

Estimated due date

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Feeding a pregnant cat

✓ Formulas from veterinary nutrition guidelines · sources below · no sign-up, nothing stored · not a substitute for your vet

How we estimate the due date

Due window = mating date + 63 to 67 days

Cats are induced ovulators, so the pregnancy clock starts close to mating. If mating happened over several days, the earliest date gives the earliest possible arrival.

Source: Merck Veterinary Manual — Pregnancy and Reproduction in Cats.

Frequently asked

How long are cats pregnant?

About 63–67 days (roughly 9 weeks), with a normal range of around 58–72 days.

How many kittens do cats have?

Usually 4–6, but anywhere from 1 to 9 or more. First litters and older queens tend to be smaller.

How can I tell if my cat is pregnant?

Pinker, enlarged nipples around week 3, weight gain and a rounding belly from week 5. A vet can confirm with palpation, ultrasound or X-ray.

What should I feed a pregnant cat?

Gradually switch to a complete kitten food from mid-pregnancy and feed small meals often. Her calorie needs rise steadily and peak during nursing.