Days to Weeks Converter
7 days = 1 week. Divide days by 7 to convert to weeks. Example: 21 days ÷ 7 = 3 weeks.
Formula
Formula
weeks = days ÷ 7
Worked example
To convert 100 days to weeks: 100 ÷ 7 ≈ 14.29 weeks (14 weeks and 2 days).
Quick reference table
| d | wk |
|---|---|
| 7 | 1 |
| 14 | 2 |
| 21 | 3 |
| 28 | 4 |
| 30 | 4.285714 |
| 60 | 8.571429 |
| 90 | 12.857143 |
| 100 | 14.285714 |
| 180 | 25.714286 |
| 365 | 52.142857 |
Unit definitions
Day (d)
The day (d) equals 24 hours or 86,400 seconds. The fundamental unit of civil time.
Week (wk)
The week (wk) equals exactly 7 days. Used globally for scheduling, calendars, and work planning.
Common use cases
- Project timelines
- Pregnancy and gestation tracking
- Subscription and billing cycles
- Fitness and training programs