A cat’s pregnancy is short and the window is fairly tight. Enter the mating date to see the likely due window, what should be happening at each stage, and the points where a vet needs to be involved.
Queens carrying large litters often deliver at the early end, and small litters at the late end. A pregnancy that passes 67 days, or a queen straining for more than about 20 minutes without producing a kitten, needs a veterinarian the same day.
Worth knowing before you use this
- Cats are induced ovulators — mating itself triggers the release of eggs, which is why the mating date is a usable anchor at all.
- A queen can mate with more than one tom in a single heat, and a single litter can have more than one father.
- A cat can come back into heat and become pregnant again very soon after a litter. If you are not breeding deliberately, this is the argument for booking the neuter now rather than later.
How this tool was built: methodology and sources
The window is taken from the published veterinary range rather than a single average. Gestation in cats runs roughly 60 to 67 days, with most queens delivering at 63 to 65. This tool reports the full range and marks the average inside it, because a single date encourages people to treat day 64 as a deadline and day 61 as an emergency.
Nothing here estimates litter size. Counting kittens needs imaging, and a guess made from the outside of a cat is how kittens get left behind at delivery.
- Pregnancy and Parturition in Cats. VCA Animal Hospitals — gestation range of 60–67 days, averaging 63–65. Reference page
- Quimby J, et al. 2021 AAHA/AAFP Feline Life Stage Guidelines. Journal of Feline Medicine and Surgery 2021;23(3):211–233 — for kitten-stage care after delivery. doi:10.1177/1098612X21993657