Grey Squirrel Gestation Calculator
Last updated
A grey squirrel's gestation period is about 44 days, or roughly 1 month and 2 weeks, though it ranges from 40 to 45 days depending on breed and individual animal.
Calculate a kit due date
Estimated birthing date
Wednesday, 18 November 2026
Earliest
14 Nov 2026
Latest
19 Nov 2026
0 of 44 days elapsed
Milestone timeline
| Day | Milestone | Date |
|---|---|---|
| 0 | Mating chase; breeding peaks in late winter and again in summer | 5 Oct 2026 |
| 30 | The female's belly and teats become noticeable | 4 Nov 2026 |
| 40 | The drey or tree cavity is lined with soft material | 14 Nov 2026 |
| 44 | Expected birth | 18 Nov 2026 |
How to use the grey squirrel 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 44-day average for this species.
- 3. Plan around the range. Use the earliest and latest dates and the milestone timeline to schedule checks, feed changes and preparation of the birthing area.
How long is a grey squirrel's gestation period?
The average is 44 days from breeding to birthing, about 1 month and 2 weeks. Anything between 40 and 45 days is normal, and a typical litter is 2-4 kits. Treat the calculated date as the middle of that window rather than a fixed appointment.
Grey squirrel gestation table: breeding date to birthing date
Breeding dates one week apart with the matching birthing date at 44 days.
| Breeding date | Expected birthing date |
|---|---|
| 5 Oct 2026 | 18 Nov 2026 |
| 12 Oct 2026 | 25 Nov 2026 |
| 19 Oct 2026 | 2 Dec 2026 |
| 26 Oct 2026 | 9 Dec 2026 |
| 2 Nov 2026 | 16 Dec 2026 |
| 9 Nov 2026 | 23 Dec 2026 |
| 16 Nov 2026 | 30 Dec 2026 |
| 23 Nov 2026 | 6 Jan 2027 |
| 30 Nov 2026 | 13 Jan 2027 |
| 7 Dec 2026 | 20 Jan 2027 |
| 14 Dec 2026 | 27 Jan 2027 |
| 21 Dec 2026 | 3 Feb 2027 |
Working backwards from a target birthing date
If you want kits on the ground in a particular week, switch the calculator to target date mode and enter the date you are aiming for. It subtracts 44 days to give the breeding date to book, plus the earliest and latest service dates that still land inside your window.