Time Duration Calculator
Enter a start and end time (24h HH:MM) to get the duration in minutes.
Calculator
Use the Time Duration Calculator
Result
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Formula
end − start (minutes)
Step-by-step
- 1
Enter both times
24-hour clock, HH:MM format.
- 2
Read the duration
Overnight gaps wrap past midnight.
Worked example
Example input: start: 09:30, end: 11:45
Result: 135
Related tools
- Work Hours
Same result in hours.
- Date Difference
Days between two dates.
- Time Converter
Convert minutes or hours to other units.
Frequently asked questions
How long is 9:30 to 11:45?
From 09:30 to 11:45 is 2 hours 15 minutes, which is 135 minutes in total. Enter start 09:30 and end 11:45 to see this computed.
What if the end time is earlier than the start time?
The calculator treats the period as crossing midnight. For example, 22:00 to 06:00 wraps around to 8 hours (480 minutes) instead of returning a negative duration.
How do I enter a time like 4:00 PM?
Convert it to 24-hour format first: 4:00 PM is 16:00, and 12:00 noon is 12:00. Any time from 0:00 to 23:59 is accepted.
Are seconds supported?
No. This calculator works with hours and minutes in HH:MM format. For unit conversion between minutes, hours and days, use the Time Converter.