Days to weeks
weeks = days × 0.14285714
Reverse: weeks to days
How to convert days to weeks
One day is 0.14285714 weeks, so multiply the number of days by 0.14285714. For example, 20 days is 20 × 0.14285714 = 2.857143 weeks. To go back, divide by the same number, or multiply by 7.
Quick estimate
Multiplying by about 0.1 gets within 30.0% of the exact answer, which is enough to check that a result makes sense.
Where it comes up
Time conversions come up in planning and scheduling, timesheets and pay, project estimates and working out ages or durations.
| days | weeks |
|---|---|
| 1 d | 0.14285714 wk |
| 2 d | 0.28571429 wk |
| 3 d | 0.42857143 wk |
| 4 d | 0.57142857 wk |
| 5 d | 0.71428571 wk |
| 6 d | 0.85714286 wk |
| 7 d | 1 wk |
| 8 d | 1.142857 wk |
| 9 d | 1.285714 wk |
| 10 d | 1.428571 wk |
| 11 d | 1.571429 wk |
| 12 d | 1.714286 wk |
| 13 d | 1.857143 wk |
| 14 d | 2 wk |
| 15 d | 2.142857 wk |
| 16 d | 2.285714 wk |
| 17 d | 2.428571 wk |
| 18 d | 2.571429 wk |
| 19 d | 2.714286 wk |
| 20 d | 2.857143 wk |
| 25 d | 3.571429 wk |
| 30 d | 4.285714 wk |
| 40 d | 5.714286 wk |
| 50 d | 7.142857 wk |
| 60 d | 8.571429 wk |
| 70 d | 10 wk |
| 75 d | 10.714286 wk |
| 80 d | 11.428571 wk |
| 90 d | 12.857143 wk |
| 100 d | 14.285714 wk |
| 120 d | 17.142857 wk |
| 150 d | 21.428571 wk |
| 200 d | 28.571429 wk |
| 250 d | 35.714286 wk |
| 300 d | 42.857143 wk |
| 400 d | 57.142857 wk |
| 500 d | 71.428571 wk |
| 750 d | 107.142857 wk |
| 1,000 d | 142.857143 wk |
| 1,500 d | 214.285714 wk |
| 2,000 d | 285.714286 wk |
| 5,000 d | 714.285714 wk |
| 10,000 d | 1,428.57 wk |
Questions
How many weeks are in a day?
0.14285714 weeks.
How do I convert days to weeks in a spreadsheet?
Put the value in A1 and type =A1*0.14285714, then fill the formula down the column.
Are the values in the table exact?
They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.