Converting days to weeks is useful for planning projects, calculating delivery deadlines or estimating the duration of a medical treatment. It is based on division by 7.
One week has 7 days. To convert days to weeks, divide the number of days by 7. A result like 1.43 weeks means 1 week and about 3 days (0.43 × 7 ≈ 3).
📐 Formula
Weeks = Days ÷ 7
📊 Reference table
| Days | Weeks | Readable result |
|---|---|---|
| 7 | 1 | 1 week |
| 14 | 2 | 2 weeks |
| 21 | 3 | 3 weeks |
| 28 | 4 | 4 weeks |
| 30 | 4.29 | 4 wks 2 days |
| 60 | 8.57 | 8 wks 4 days |
| 90 | 12.86 | 12 wks 6 days |
| 180 | 25.71 | 25 wks 5 days |
| 365 | 52.14 | 52 wks 1 day |
💡 Practical examples
Example 1: 21 days
21 ÷ 7 = 3 weeks. Classic duration of an intensive training course.
Example 2: 45 days
45 ÷ 7 = 6.43 weeks, which is 6 weeks and 3 days. Common deadline in web projects.
Example 3: 100 days
100 ÷ 7 ≈ 14.3 weeks. Duration often cited to measure the first 100 days of a mandate.