Every week is exactly 168 hours
weeks = hours ÷ 168, hours = weeks × 168
A week is 7 days of 24 hours, so 7 × 24 = 168 hours, exact and unchanging. To go the other way, multiply weeks by 168: 2.5 weeks is 420 hours.
Quick reference
| Hours | Weeks | Hours | Weeks |
|---|---|---|---|
| 24 | 0.14 | 504 | 3.0 |
| 40 | 0.24 | 840 | 5.0 |
| 84 | 0.5 | 1,344 | 8.0 |
| 168 | 1.0 | 2,016 | 12.0 |
| 336 | 2.0 | 2,688 | 16.0 |
Calendar weeks vs work weeks
- Calendar week. 168 hours — all 7 days, the number this converter uses.
- Work week. Usually 40 hours (5 days of 8), the full-time standard in the US and much of the world. Divide by 40, not 168, when the hours are worked hours: 2,000 hours is 50 work weeks but only about 11.9 calendar weeks.
- Which to use. Project effort and timesheets are work weeks; elapsed time and machine runtime are calendar weeks. Mixing them is the usual mistake.
Common questions
How many hours are in a week?
Exactly 168 hours, from 7 days times 24 hours. This is fixed everywhere and never varies by region or time zone.
How do I convert hours to weeks?
Divide the hours by 168. For example 500 hours divided by 168 is 2.98 weeks, which is just under 3 weeks.
Is a work week 168 hours?
No. A calendar week is 168 hours, but a full-time work week is usually 40 hours (5 days of 8 hours). If you are counting labour, divide by 40 instead of 168, so 500 hours is 12.5 work weeks.
