Time Duration Calculator
Quick Conversions
Related Calculators
Understanding Time Duration
Common Uses
Travel & Transportation
- Flight duration
- Commute time
- Layover calculations
- Trip planning
Work & Productivity
- Meeting duration
- Task time tracking
- Shift calculations
- Project hours
Handling Midnight Crossings
When a time period crosses midnight, the calculator automatically handles the day change. For example, from 11:00 PM to 2:00 AM is correctly calculated as 3 hours.
Tip
For durations spanning multiple days, use the date+time mode to get accurate results that account for full days plus the time difference.
Frequently Asked Questions
How do I calculate time duration between two times?
Subtract start time from end time. For 9:15 AM to 2:45 PM: Convert to 24-hour (09:15 and 14:45), then 14:45 - 09:15 = 5 hours 30 minutes. For times crossing midnight, add 24 hours to the end time first.
How do I calculate duration that crosses midnight?
Add 24 hours to the end time before subtracting. From 10:30 PM to 6:15 AM: (6:15 + 24:00) - 22:30 = 30:15 - 22:30 = 7 hours 45 minutes.
What is elapsed time vs clock time?
Elapsed time is the duration between two points (e.g., '3 hours 15 minutes'). Clock time is a specific moment (e.g., '2:30 PM'). This calculator finds elapsed time given two clock times.
How do I express duration in different units?
3 hours 30 minutes = 3.5 hours = 210 minutes = 12,600 seconds. To convert: multiply hours by 60 for minutes, by 3600 for seconds. To get decimal hours, divide minutes by 60.