How to convert days to weeks
Formula: wk = d ÷ 7
Worked example: 3 d → 3 ÷ 7 = 0.428571 wk
Multiply weeks by 7. A 40 week pregnancy lasts 280 days, and a 6 week notice period lasts 42 days.
Days to weeks conversion chart
| Days (d) | Weeks (wk) |
|---|---|
| 1 d | 0.142857 wk |
| 2 d | 0.285714 wk |
| 3 d | 0.428571 wk |
| 4 d | 0.571429 wk |
| 5 d | 0.714286 wk |
| 6 d | 0.857143 wk |
| 7 d | 1 wk |
| 8 d | 1.14286 wk |
| 9 d | 1.28571 wk |
| 10 d | 1.42857 wk |
| 12 d | 1.71429 wk |
| 15 d | 2.14286 wk |
| 20 d | 2.85714 wk |
| 24 d | 3.42857 wk |
| 30 d | 4.28571 wk |
| 36 d | 5.14286 wk |
| 45 d | 6.42857 wk |
| 48 d | 6.85714 wk |
| 60 d | 8.57143 wk |
| 72 d | 10.2857 wk |
| 90 d | 12.8571 wk |
| 100 d | 14.2857 wk |
| 120 d | 17.1429 wk |
What is a day?
The day equals 24 hours or 86,400 seconds. It is the natural unit for deadlines, rentals, notice periods and medication courses. The occasional leap seconds added to official clocks are ignored here.
What is a week?
The week is 7 days or 168 hours. Pregnancies, payroll periods, training plans and project schedules are often counted in weeks. A year has a little over 52 weeks.