Cat Pregnancy Calculator
Enter the mating date to estimate your cat's due date, based on the typical 64-day feline gestation period.
Last updated: September 25, 2026
Frequently asked questions
How long are cats pregnant?
The average feline gestation period is about 64 days from conception, typically ranging from 63 to 65 days.
How many kittens are in an average litter?
Cat litters typically range from 3 to 5 kittens, though first litters and some breeds tend to be smaller.
How can I tell if a cat is pregnant before the due date estimate matters?
Signs include enlarged and pinker nipples ('pinking up') around 2-3 weeks, gradual abdominal enlargement after about 3-4 weeks, and increased appetite - a veterinarian can confirm pregnancy via palpation as early as day 17-25 or ultrasound, which is more reliable than estimating from mating date alone.
Do cats show physical signs of pregnancy right away?
Not usually - most physical signs, like a swollen abdomen or enlarged nipples, become noticeable around 3-4 weeks into the pregnancy, well after conception. Behavioral changes like increased affection or appetite can sometimes appear earlier, but a vet exam or ultrasound is the most reliable early confirmation.
Why is the default gestation length 64 days for cats but different from dogs?
Feline and canine gestation lengths are close but not identical - cats average about 64 days versus roughly 63 for dogs - so the calculator uses species-appropriate defaults, though you can adjust the field if your vet gives a more specific estimate.
If my cat mated on day 1, when is she due?
Adding the default 64-day gestation length to the mating date gives the estimated due date - for example, a mating date of January 1 projects a due date around March 6.
Can a cat get pregnant again shortly after giving birth?
Yes - cats can enter heat again within weeks of giving birth, even while still nursing, so an unspayed cat can become pregnant again almost immediately after her litter, which is worth knowing when timing future due-date estimates.