Breeding
Cat pregnancy calculator: when are the kittens due?
Cats are pregnant for about 63 to 65 days, normally 60 to 69 days. Enter the mating date to see the due date and when a vet can confirm it.
Cat pregnancy timeline
| When | What |
|---|---|
| Day 21 | Vet may feel swellings by palpation |
| Days 25–35 | Best window for an ultrasound |
| From day 42–45 | Skeletons show on x-ray: litter count |
| Day 60–69 | Normal delivery window |
| Day 64 | Average due date |
Citing this? Link to https://tools.thesturdypaw.com/cat-pregnancy/. Gestation from VCA (dogs) and University of Illinois (cats); checks from the Merck Veterinary Manual. Free to reuse with a link (CC BY 4.0).
Questions
How long are cats pregnant?
About 63 to 65 days on average, with a normal range of about 60 to 69 days.
How soon can a vet confirm a cat is pregnant?
Ultrasound is most reliable around days 25–35; a vet may feel the swellings from about day 21.
When can you count the kittens?
With an x-ray from about day 42–45.
What are early signs of pregnancy in cats?
Pinker, larger nipples a few weeks in, weight gain and a growing belly; only a vet can confirm.
Why is the due date a range?
Cats can mate several times over a few days, so the exact conception date is uncertain.
When should I call the vet?
If labour stalls, your cat strains without a kitten, or nothing has happened by about day 69; call straight away if she seems unwell.
Do indoor cats need to be spayed?
Spaying prevents pregnancy; ask your vet when to do it.
Can a cat get pregnant while nursing?
Yes, cats can come back into heat soon after giving birth.
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