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Cat Pregnancy Calculator Guide
Knowing when your cat is due lets you set up a quiet queening area and have your vet on standby. Enter the mating date to get your cat's estimated due date, the normal delivery window, and a week-by-week timeline.
Due date = mating date + 65 days. Feline gestation averages 65 days, with normal deliveries between 63 and 67 days (about 9 weeks).
How Long Are Cats Pregnant?
Cats are pregnant for an average of 65 days from mating, or roughly 63–67 days. Because a queen can be bred over more than one day, treat the due date as the middle of a short window.
Week-by-Week Queening Timeline
| Days from Mating | What Happens |
|---|---|
| Day 16–20 | Nipples "pink up"; ultrasound can confirm pregnancy |
| Day 21–28 | Appetite increases; belly begins to grow |
| Day 40+ | X-ray can count kittens |
| Day 58–60 | Set up the nesting box; she seeks a quiet spot |
| Day 63–67 | Delivery window; nesting and restlessness signal labor |
Signs Labor Is Near
- Nesting in a quiet, hidden spot.
- Drop in appetite and restlessness in the last 24 hours.
- Temperature drop below about 100°F often precedes labor.
Worked Example
Mated on April 1 → due June 5 (April 1 + 65 days), with normal delivery from June 3 (Day 63) to June 7 (Day 67).
This is an estimate, not veterinary advice — confirm pregnancy and monitor your cat with your vet. See also our Cat Calorie Calculator and Dog Pregnancy Calculator.
Frequently Asked Questions
How long are cats pregnant?
Cats are pregnant for an average of 65 days from mating, with normal deliveries between 63 and 67 days.
How do I calculate my cat's due date?
Add 65 days to the first mating date and treat it as the middle of a 63–67 day window.
How many days is cat gestation?
Feline gestation is about 65 days, or roughly nine weeks.
What are the signs a cat is close to giving birth?
Nesting in a quiet spot, a drop in appetite, restlessness, and a body-temperature drop below about 100°F.
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