Cat Gestation Calculator
Last updated
A cat's gestation period is about 64 days, or roughly 2 months, though it ranges from 61 to 67 days depending on breed and individual animal.
Calculate a kitten due date
The mating date is an unreliable anchor. Sperm can survive several days in the reproductive tract, the egg only matures two to three days after ovulation, and the female may accept mating either side of ovulation. Ask your vet about progesterone testing to pinpoint ovulation and narrow the due date to about two days.
Estimated queening date
Wednesday, 30 December 2026
Earliest
23 Dec 2026
Latest
6 Jan 2027
0 of 64 days elapsed
Milestone timeline
| Day | Milestone | Date |
|---|---|---|
| 21 | Ultrasound confirms pregnancy | 17 Nov 2026 |
| 45 | Set up nesting box | 11 Dec 2026 |
| 58 | Begin daily monitoring | 24 Dec 2026 |
| 64 | Expected queening | 30 Dec 2026 |
How to use the cat gestation calculator
- 1. Choose what you know. Enter the breeding date to get a due date, or switch to the target due date mode to work backwards to the breeding date you need.
- 2. Refine the inputs. The calculator uses the 64-day average for this species. If you know the ovulation date from progesterone testing, select it for a much tighter range.
- 3. Plan around the range. Use the earliest and latest dates and the milestone timeline to schedule checks, feed changes and preparation of the queening area.
How long is a cat's gestation period?
The average is 64 days from breeding to queening, about 2 months. Anything between 61 and 67 days is normal, and a typical litter is 3-5 kittens. Treat the calculated date as the middle of that window rather than a fixed appointment.
Cat gestation table: breeding date to queening date
Breeding dates one week apart with the matching queening date at 64 days.
| Breeding date | Expected queening date |
|---|---|
| 27 Oct 2026 | 30 Dec 2026 |
| 3 Nov 2026 | 6 Jan 2027 |
| 10 Nov 2026 | 13 Jan 2027 |
| 17 Nov 2026 | 20 Jan 2027 |
| 24 Nov 2026 | 27 Jan 2027 |
| 1 Dec 2026 | 3 Feb 2027 |
| 8 Dec 2026 | 10 Feb 2027 |
| 15 Dec 2026 | 17 Feb 2027 |
| 22 Dec 2026 | 24 Feb 2027 |
| 29 Dec 2026 | 3 Mar 2027 |
| 5 Jan 2027 | 10 Mar 2027 |
| 12 Jan 2027 | 17 Mar 2027 |
Working backwards from a target queening date
If you want kittens on the ground in a particular week, switch the calculator to target date mode and enter the date you are aiming for. It subtracts 64 days to give the breeding date to book, plus the earliest and latest service dates that still land inside your window.