Cat pregnancy calculator

Date she mated (first date if more than one)

Last mating date (if more than one)

Optional. Widens the window.

Don’t know the date? A vet can estimate how far along she is by feeling her belly, ultrasound or X-ray.

Estimated due date

Dec 10, 2026

Most queens give birth between Sun, Dec 6, 2026 and Tue, Dec 15, 2026 (days 61–70 after mating).

Oct 27, 2026Day 21: “Pinking up”: nipples may turn pink and enlarge from about weeks 3–4
Oct 31, 2026Day 25: A vet can usually confirm pregnancy by feeling the belly or ultrasound (about weeks 3–4)
Nov 3, 2026Day 28: Switch gradually to kitten food; appetite rises through late pregnancy
Nov 20, 2026Day 45: X-ray can count kittens from about day 45
Nov 25, 2026Day 50: Set up a quiet, warm nesting box (at least 2 weeks before the due date)
Dec 5, 2026Day 60: Watch for nesting, restlessness and loss of appetite; labor is close

Call your vet if she strains hard for 30–60 minutes with no kitten, or goes past day 70 with no labor.