Time Duration Calculator
Calculate the duration between two times in hours and minutes, with break deduction, decimal hours, and overnight support.
About This Free Online Time Duration Calculator
Our free time duration calculator finds how much time is between a start and end time. Enter the two times, optionally subtract a break in minutes, and instantly see the duration in hours and minutes, decimal hours, total minutes, and total seconds. It handles overnight shifts automatically — if the end time is earlier than the start, it assumes the next day. Great for timesheets, work hours, billing, cooking, and any time you need to measure a span of time. Everything runs in your browser.
Features of Our Time Duration Calculator
- Duration in hours and minutes
- Decimal hours for timesheets and billing
- Subtract a break in minutes
- Handles overnight (past-midnight) spans
- Total minutes and seconds
- 100% private — browser-only processing
How to Use the Time Duration Calculator
The Time Duration Calculator works right in your browser — no signup, no installation. Follow these steps:
- Enter the start time and end time.
- Optionally enter a break in minutes to subtract.
- Read the duration in hours, minutes, and decimal hours.
- Copy the result for your timesheet or notes.
Frequently Asked Questions About Time Duration Calculator
How do I calculate hours between two times?
Enter the start and end times and the calculator shows the duration in hours and minutes, plus decimal hours. For example, 9:00 to 17:30 is 8h 30m, or 8.5 decimal hours.
Does it handle overnight shifts?
Yes. If the end time is earlier than the start time, the calculator assumes it is the next day and adds 24 hours, so an 22:00 to 06:00 shift correctly reads 8 hours.
What are decimal hours for?
Decimal hours express minutes as a fraction of an hour (30 minutes = 0.5). Payroll and billing systems often use decimal hours rather than hours and minutes.
Why Choose the Time Duration Calculator?
The Time Duration Calculator is built for answers you can rely on, not rough guesses. Every calculation happens locally in your browser the moment you enter a value, so results are immediate, the math is transparent, and nothing you type ever leaves your device.