Time duration calculator
Measure the exact gap between a start and end time — in hours, minutes, and decimal hours — with automatic handling of spans that cross midnight.
Time duration
How long between a start and end time — crosses midnight automatically.
How long between two times?
The duration calculator answers a simple question that is surprisingly fiddly by hand: how much time sits between two clock readings. Enter the start and end above and the result updates instantly, including the decimal-hours figure that payroll and invoicing usually need.
Crossing midnight
When the end time is earlier on the clock than the start time, Timesabout assumes the end falls on the next day and adds a full day before subtracting. That makes overnight shifts, flights, and late sessions come out correct without any manual adjustment.
Related calculators
To count from the present moment, use hours from now or minutes from now. Look back with hours ago.
Frequently asked
How do I calculate the duration between two times?
Enter a start time and an end time. Timesabout subtracts the start from the end and returns the total hours and minutes. If the end is earlier than the start, it treats it as crossing midnight into the next day.
Does it handle overnight shifts?
Yes. A shift from 22:00 to 06:00 is read as 8 hours, because the calculator rolls past midnight automatically.
Can I get the result in decimal hours?
Yes. Below the main result the duration is also shown in decimal hours, which is useful for timesheets and billing.