CalcPenguin

Hours and Time Calculator

Count the hours and minutes between two times, take off breaks, handle night shifts past midnight, and get decimal hours for timesheets.

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minutes
days

Time each day

8 h 0 min

In decimal hours
8 hours
Over 5 days
40 h 0 min

From 09:00 to 17:30 with a 30-minute break is 8 h 0 min (8 hours). Over 5 days that's 40 h 0 min.

How it's worked out

  1. From start to end09:00 to 17:308 h 30 min
  2. Minus the break510 − 30 minutes8 h 0 min
  3. As decimal hours (for timesheets)480 ÷ 608

How it works

Hours worked = end time − start time − break · Decimal hours = minutes ÷ 60

Worked example

9:00 to 17:30 is 8 hours 30 minutes; minus a 30-minute break it's 8 hours. Five days like that make 40 hours.

Questions people ask

How do I calculate hours worked?

Subtract the start time from the end time, then take off unpaid breaks. 9:00 to 17:30 with a 30-minute break is 8 hours.

What if the shift goes past midnight?

Enter the times as they are; when the end time is earlier than the start, the calculator counts it as the next day. 22:00 to 06:15 is 8 hours 15 minutes.

What are decimal hours?

Hours written as a decimal for payroll: 8 hours 15 minutes is 8.25 hours, because 15 minutes is a quarter of an hour.

Formula and rules last checked 25 October 2026Written and tested by the CalcPenguin teamReport a problem