How to use the cat pregnancy week calculator
- Enter the mating date.
- Optional: pick another date to check.
- Press Calculate.
Worked example
A cat mated on 1 October 2026, checked on 18 October 2026.
- Mating date
- 2026-10-01
- On this date (leave empty for today)
- 2026-10-18
- Days to go
- 46 days to day 63
- Expected around
- 3 Dec 2026
- Latest normal date
- 9 Dec 2026
- Earliest normal
- day 61
If there are no young by the latest normal date, or she strains for 30–60 minutes without producing one, call your vet.
Example values are illustrative; this result is produced by the same calculator above.
How we calculate it
Sources: Merck Veterinary Manual
Understanding your result
Enter your cat's mating date and the calculator shows which day and week of pregnancy she is in today and how many days remain until about day 63. A cat mated on 1 October 2026 is on day 17, in week 3, on 18 October 2026.
Cat pregnancy lasts about 63 to 65 days from mating, and births between day 61 and day 69 are usually normal. The calculator shows the expected date and the latest normal day.
Cats can mate several times, so the exact date may be uncertain. Treat the result as a window and ask your vet to confirm the pregnancy and plan the birth. Call your vet if there are no kittens by day 69 or if she strains without producing a kitten.
Common mistakes
- Using the first sign of heat instead of the mating date.
- Treating day 63 as an exact due date.
- Waiting past day 69 before calling the vet.
- Changing food without vet advice.
- Not preparing a quiet nesting space.
Good to know
- Pregnant and nursing cats need more energy; ask your vet for a feeding plan.
- The Cat Pregnancy Due Date Calculator shows the due window.
- Kittens should see a vet for a first check and vaccination plan.
When to talk to your vet
- No kittens by day 69
- Straining without a kitten for 30–60 minutes
- Your cat seems unwell
Frequently asked questions
How many weeks pregnant is my cat?
Count the days from the mating date and divide by 7. The calculator shows the current day, the pregnancy week and the days left until about day 63.
When will my cat give birth?
About 63–65 days after mating; births between day 61 and day 69 are usually normal.
When should I call the vet?
If there are no kittens by day 69, if your cat strains for 30–60 minutes without a kitten, or if she seems unwell.
What is the difference from the Cat Pregnancy Due Date Calculator?
That tool gives the due window. This one tells you where she is today: the day and week of pregnancy, and the days remaining.
What if I am not sure of the mating date?
Cats can mate several times, so enter the most likely date and treat the result as approximate. Your vet can confirm with an ultrasound.
When is it an emergency?
Call your vet if there are no kittens by day 69, if she strains for 30–60 minutes without a kitten, or if she seems unwell.
Sources
Guides about this
Related calculators
- Cat Pregnancy Due Date CalculatorEstimate when your cat's kittens are due.
- Cat Calorie CalculatorWork out how many calories your cat needs each day, from its weight and life stage.
- Kitten Food CalculatorFind out how many calories a growing kitten needs and how much food that is.
Estimates only. Every pet is different — confirm with your veterinarian. If your pet may have eaten something harmful, contact your vet or an animal poison helpline now.