Time Duration Calculator
Calculate the duration between two times. Find hours, minutes, and seconds between any start and end time.
Time Details
Duration Results
0
hours
0
minutes
0
total minutes
0
hours (decimal)
💡 Tip: If the end time is earlier than the start time, the calculator assumes the duration crosses midnight (e.g., 11 PM to 2 AM = 3 hours).
How to Calculate Time Duration
Calculating the duration between two times involves finding the difference between the start and end times. This is useful for tracking work hours, flight durations, event lengths, and more.
Manual Calculation Method
- Convert to 24-hour format: If using 12-hour time, convert PM times by adding 12 (e.g., 2 PM = 14:00).
- Subtract start from end: If the result is negative, add 24 hours (for overnight durations).
- Convert to desired units: Multiply or divide to get hours, minutes, or seconds.
Example Calculation
Calculate the duration from 9:00 AM to 5:30 PM:
- Start: 9:00 (9 hours)
- End: 17:30 (17.5 hours)
- Difference: 17.5 - 9 = 8.5 hours
- Result: 8 hours and 30 minutes
Common Time Duration Conversions
| Unit | Conversion |
|---|---|
| 1 Hour | 60 Minutes |
| 1 Minute | 60 Seconds |
| 1 Hour | 3,600 Seconds |
| 1 Day | 24 Hours |
| 1 Week | 168 Hours |
Applications
- Payroll: Calculating work hours for hourly employees.
- Travel: Determining flight or drive durations.
- Events: Planning event schedules and timelines.
- Cooking: Timing recipes and baking.
References
- Time and Date AS. "Time Duration Calculator." 2026.
- U.S. Department of Labor. "Hours Worked." 2026.