Cat Gestation Calculator
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.
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.
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
Thursday, 1 October 2026
Earliest
24 Sept 2026
Latest
8 Oct 2026
0 of 64 days elapsed
Milestone timeline
| Day | Milestone | Date |
|---|---|---|
| 21 | Ultrasound confirms pregnancy | 19 Aug 2026 |
| 45 | Set up nesting box | 12 Sept 2026 |
| 58 | Begin daily monitoring | 25 Sept 2026 |
| 64 | Expected queening | 1 Oct 2026 |
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 |
|---|---|
| 29 Jul 2026 | 1 Oct 2026 |
| 5 Aug 2026 | 8 Oct 2026 |
| 12 Aug 2026 | 15 Oct 2026 |
| 19 Aug 2026 | 22 Oct 2026 |
| 26 Aug 2026 | 29 Oct 2026 |
| 2 Sept 2026 | 5 Nov 2026 |
| 9 Sept 2026 | 12 Nov 2026 |
| 16 Sept 2026 | 19 Nov 2026 |
| 23 Sept 2026 | 26 Nov 2026 |
| 30 Sept 2026 | 3 Dec 2026 |
| 7 Oct 2026 | 10 Dec 2026 |
| 14 Oct 2026 | 17 Dec 2026 |
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.