Knowing how many days a certain number of weeks represents is useful in many contexts: pregnancy (weeks of amenorrhea), contractual deadlines, agile sprint schedules or sports preparation.
One week has 7 days. To convert weeks to days, multiply the number of weeks by 7.
📐 Formula
Days = Weeks × 7
📊 Reference table
| Weeks | Days |
|---|---|
| 1 | 7 |
| 2 | 14 |
| 3 | 21 |
| 4 | 28 |
| 6 | 42 |
| 8 | 56 |
| 12 | 84 |
| 26 | 182 |
| 52 | 364 |
💡 Practical examples
Example 1: 4 weeks
4 × 7 = 28 days. Approximate duration of a calendar month or menstrual cycle.
Example 2: 12 weeks
12 × 7 = 84 days, approximately 3 months. Duration of a quarter or a fitness program.
Example 3: 40 weeks
40 × 7 = 280 days. Standard duration of a human pregnancy.