Time Duration Calculator
Calculate duration between two times.
Calculate duration between two times.
Time range
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Tool guide
Free Online Time Duration Calculator
Calculate the time difference between two clock times in hours, minutes, and seconds. Formatza supports same-day intervals and an optional crossing-midnight mode for overnight durations, all directly in your browser.
Steps
How it works
- Enter the start time and end time.
- Enable Allow crossing midnight when an earlier end time belongs to the following day.
- Calculate the elapsed clock time in your browser.
- Review, copy, or download the hours, minutes, and seconds result.
Highlights
Key features
- Uses structured browser time inputs.
- Calculates same-day time intervals.
- Supports an optional overnight interval that crosses midnight.
- Reports separate hour, minute, and second components.
- Provides copy and TXT download actions for the result.
Use cases
Common uses
- Find the elapsed time between two clock readings.
- Calculate the length of an overnight activity or shift.
- Check hours and minutes between appointments.
- Measure a simple work-time interval before separate payroll calculations.
Notes
Limitations to know
- The inputs contain hours and minutes, so entered seconds are not supported.
- Durations are limited to one clock interval and cannot exceed 24 hours.
- An earlier end time is rejected unless Allow crossing midnight is enabled.
- There is no break deduction, decimal-hour output, payroll logic, overtime, or timesheet management.
- Dates and multi-day ranges are not accepted.
FAQ
Frequently asked questions
Can it calculate a duration that crosses midnight?
Yes. Enable Allow crossing midnight, then an end time earlier than the start time is treated as occurring on the following day.
What happens when the end time is earlier?
The tool asks you to enable crossing-midnight handling. Without that option, the interval is considered invalid.
Can I enter seconds?
No. The current time controls accept hours and minutes. The displayed seconds component is therefore zero for normal inputs.
Does it show decimal hours?
No. The result is presented as clock-style hours, minutes, and seconds rather than a decimal-hour total.
Can it deduct a work break?
No. There is no break field or payroll calculation; subtract any break separately.
Can it calculate more than 24 hours?
No. Use a date-based duration calculator when an interval spans multiple days.