Cat pregnancy guide
How long is a cat pregnant?
A cat is pregnant for about 65 days (about 9 weeks). The normal range is 63 to 67 days, so most kittens arrive within that window rather than on the exact average day.
Quick rule: Count 9 weeks forward from the mating date. The birth window runs from day 63 to day 67.
How to use the cat pregnancy calculator
1. Enter the mating date. Use the first mating date if she mated on several days. Tap Use today if it was today.
Then follow the schedule. Each task gets a real date, the next one is highlighted, the status shows whether your queen is on track, and the week by week cards above show where things stand. Use Copy schedule or Add to Google Calendar to keep it.
Gestation formulas
- Estimated birth date = mating date + 65 days
- Earliest normal birth = mating date + 63 days
- Latest normal birth = mating date + 67 days
- Breed adjustment = breed average minus 65 days, applied to the whole window
- Call your vet if nothing has happened by day 70
Care schedule for a pregnant queen
| When | Task | Why |
|---|---|---|
| Day 18 | Look for pinking up | Nipples turn pink and enlarge around week 3. |
| Day 21 | Vet check | Palpation from day 21 or ultrasound from about day 25. Never press her belly yourself. |
| Day 35 | Switch to kitten food | Change gradually over 5 to 7 days for extra calories and protein. |
| Day 45 | Set up a nesting box | Warm, quiet, draught free spot. Let her claim it early. |
| Day 56 | Keep her indoors | Have towels, your vet number, and a backup milk replacer ready. |
Signs of birth and when to call the vet
Labour is close if she has
- ✓Nesting and seeking a hiding place
- ✓Restless, vocal or very affectionate
- ✓Temperature drops to about 37.8 C (100 F)
- ✓Licking her genital area and visible contractions
Call your vet immediately if
- !Strong straining for 30 minutes with no kitten born
- !A baby is visible but stuck, or comes backwards with no progress
- !Heavy bleeding or foul-smelling discharge
- !She is weak, collapsed, off her food or in obvious pain
- !No birth by day 70
Frequently asked questions
How long is a cat pregnant?
A cat is pregnant for about 65 days (about 9 weeks). Most kittens arrive between day 63 and day 67.
How accurate is this calculator?
It uses the average length and the normal range published in veterinary references, adjusted for the breed you pick. Individual animals vary, so treat the date as the middle of a window, not a promise.
When can I confirm the pregnancy?
Vet check around day 21. Palpation from day 21 or ultrasound from about day 25. Never press her belly yourself.
What if she goes past the due date?
Going a few days past the average is normal. The calculator marks day 67 as the end of the usual window and day 70 as the point to call your vet even if she seems well.
What are the signs that birth is close?
Nesting and seeking a hiding place. Restless, vocal or very affectionate. Temperature drops to about 37.8 C (100 F).
Is my data saved?
No. Everything is calculated in your browser. Nothing you type is stored or sent anywhere.
Disclaimer: This calculator gives estimates for planning only. It is not veterinary advice and cannot replace an examination by your vet. If you are worried at any stage, especially around birth, contact your vet promptly.
