How it works
Duration = end − start − break. When the end time is earlier than the start time, the period passes midnight and 24 hours are added. Between dates, every full day adds 24 hours. Decimal hours = minutes ÷ 60.
Worked examples
- 9:00 AM to 5:30 PM = 8 hours 30 minutes (8.5 hours). With a 30-minute unpaid break, 8 hours.
- 10:00 PM to 6:30 AM passes midnight: 6:30 − 22:00 + 24:00 = 8 hours 30 minutes.
- Friday 8:00 AM to Sunday 8:00 PM = 2 days 12 hours = 60 hours.
Common questions
How many hours is 8 AM to 5 PM?
9 hours. With a 1-hour unpaid lunch, 8 hours worked.
How do I count a shift that ends after midnight?
Enter the start and end times as they are. When the end is earlier than the start, the calculator counts it as the next day.
What if the time is longer than 24 hours?
Use the dates and times section. It counts across any number of days.
Does it allow for daylight saving time?
No. On the nights the clocks change, a shift can be one hour longer or shorter than the clock times suggest.