Cat pregnancy calculator
Type the date she was bred: the kittening date, the likely window and what to do before.
Cats carry about 64 days — about 2 months. Most have their kittens between day 60 and day 67 after breeding.
Date bred
The day she was with the tom.
Pick the date she was bred to see her due date.
Example: a queen bred on September 1 is due about November 4 — most likely between October 31 and November 7.
What to do and when
Day 45
X-ray to count the kittens
From about day 45.
14 days before she is due
Set up a kittening box
She usually looks for a place in the last two weeks.
Day 68
Past her normal window
If she has not had her kittens, call your vet.
A common guide — your vet’s plan wins.
Questions
How long are cats pregnant?
Cats carry about 64 days — about 2 months. Most have their kittens between day 60 and day 67 after breeding.
How do I work out a cat’s due date?
Add 64 days to the day she was bred. Example: a queen bred on September 1 is due about November 4 — most likely between October 31 and November 7.
Why a window and not one day?
No two cats are the same. Most give birth between day 60 and day 67, so start watching her at the beginning of the window.
What if she was with the tom for weeks?
Enter the first and the last day they were together. The window then runs from the first day plus 60 days to the last day plus 67 days.
Sources
Last checked September 30, 2026. A common guide — your vet’s plan wins.
More calculators
Remembers every animal’s due date and reminds you before each job — the pregnancy check, the pen, the watch. Coming to the App Store this winter.