Time duration calculator

How long between two times, or what several durations add up to.

Without dates, an end time earlier than the start is read as the next day.

Time between two times

Subtract the start from the end. If the minutes of the end are smaller, borrow an hour: 4:50 PM minus 8:15 AM is 16:50 - 8:15 = 8 hours 35 minutes. Across midnight, add 24 hours to the end first.

Adding hours and minutes

Add the hours and the minutes separately, then carry every 60 minutes into an hour: 2:45 + 1:30 = 3 hours 75 minutes = 4 hours 15 minutes.

For a whole week with lunch breaks, the time card calculator does the same arithmetic day by day; for single conversions, hours to minutes is quicker.

Formula and examples checked . Found a problem? Tell us.

Questions

How many hours are between 8:15 AM and 4:50 PM?

8 hours 35 minutes, which is 8.58 decimal hours.

How do I add 45 minutes to 2 hours 30 minutes?

Minutes: 30 + 45 = 75, which is 1 hour 15 minutes. Hours: 2 + 1 = 3. Total 3 hours 15 minutes.