The formula
One day is exactly 24 hours, so hours = days × 24. 3.5 days = 84 hours, which is 5,040 minutes or 302,400 seconds. To go from hours to days, divide by 24: 100 hours = 4 days 4 hours.
For annual leave and contracts, a "day" often means a working day. A typical UK full-time day is 7.5 or 8 hours, so 5 days of leave can mean 37.5 working hours. For legal leave entitlement, see the holiday entitlement calculator.
Quick table
- 1 day = 24 hours
- 2 days = 48 hours
- 7 days = 168 hours
- 30 days = 720 hours
- 365 days = 8,760 hours
Frequently asked questions
How many hours in a week?
168.
How many hours in a year?
8,760 (8,784 in a leap year).
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