Weeks to Days Converter
Handy for pregnancy timelines, notice periods, training plans and delivery estimates.
1 wk = 7 d
days
1 wk = 7 d
How to convert weeks to days
Multiply the number of weeks by 7.
Formula
d = wk × 7
Examples
- 3 wk × 7 = 21 d
- 12 wk × 7 = 84 d
- 40 wk × 7 = 280 d
Weeks to days conversion table
| Weeks (wk) | Days (d) |
|---|---|
| 1 | 7 |
| 2 | 14 |
| 3 | 21 |
| 4 | 28 |
| 5 | 35 |
| 6 | 42 |
| 8 | 56 |
| 10 | 70 |
| 12 | 84 |
| 13 | 91 |
| 16 | 112 |
| 20 | 140 |
| 26 | 182 |
| 40 | 280 |
| 52 | 364 |
Values rounded to 4 decimal places or 4 significant digits.
About weeks
A week is 7 days, which is 168 hours or 604,800 seconds.
About days
A day here means exactly 24 hours (86,400 seconds). Calendar days can differ: a day with a daylight saving time change lasts 23 or 25 hours on the clock.
Frequently asked questions
How many days are in one week?
One week equals 7 days.
How do I convert weeks to days?
Multiply the number of weeks by 7. For example: 12 wk × 7 = 84 d.
How many weeks are in one day?
One day equals 0.1429 weeks.
Is the wk to d conversion exact?
Yes. The factor follows directly from the official definitions of both units, so the only rounding is in how many decimals are displayed.