Time duration calculator
Pick a start time and an end time to see how long it is between them, in hours and minutes, in decimal hours and in total minutes. If the end is earlier than the start, the calculator reads it as the next day, so 22:30 to 07:15 is 8 hours 45 minutes.
Time between two times
Dates use your time zone, , so a daylight-saving night counts its real length.
8:30 hours:minutes
| Decimal hours | |
| Total minutes | |
| Days, hours and minutes |
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For longer spans, tick “Add dates” and choose the start and end days. Dates are read in your own time zone, which matters twice a year: the night the clocks go back is an hour longer, and the night they go forward is an hour shorter.
This measures elapsed time only. It doesn’t take off breaks or split anything into regular and overtime hours. For a shift with lunch, or a full week of shifts with overtime, use the hours calculator on the home page instead.
Worked example: 08:47 to 16:13
| Start | 08:47 |
|---|---|
| End | 16:13 |
| Duration (hours:minutes) | 7:26 |
| Decimal hours | 7.43 |
| Total minutes | 446 |
Working out the time between two times
Write both times on the 24-hour clock, then subtract. From 08:47 to 16:13: the minutes don’t go (13 is less than 47), so borrow an hour and make it 15:73. 73 − 47 = 26 minutes and 15 − 8 = 7 hours, so 7 hours 26 minutes.
In decimals that’s 7 + 26 ÷ 60 = 7.43 hours, and in minutes it’s 7 × 60 + 26 = 446.
When the end is earlier than the start, add 24 hours to the end first: 22:30 to 07:15 becomes 22:30 to 31:15, which is 8 hours 45 minutes.
Questions
How many hours is it from 9am to 5pm?
8 hours. From 9:00 to 17:00 on the 24-hour clock is 17 − 9 = 8. As decimal hours it’s 8.00, and in minutes 480.
How long is 7am to 3:30pm?
8 hours 30 minutes, or 8.50 decimal hours. If that’s a work shift with a 30-minute unpaid lunch, you worked 8 hours.
How do I find the time between two times past midnight?
Type the times as they are, for example 22:00 to 06:00. An end time earlier than the start counts as the next day, so the answer is 8 hours.
Can it count across several days?
Yes. Tick “Add dates”, then choose the start and end days. A span of more than 24 hours also shows as days, hours and minutes.
Why is my overnight span an hour off?
With dates on, a night when the clocks change really is an hour longer or shorter. In New York, midnight on November 1, 2026 to midnight on November 2 is 25 hours.