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Time Duration Calculator

Calculate the duration between two times.

Everyday
Time Duration Calculator
Calculate the duration between two times on the same day.

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Calculate Time Intervals Accurately

This tool calculates the precise duration in hours, minutes, and seconds between a start time and an end time. It correctly handles periods that cross midnight, making it perfect for calculating work shifts, flight times, or any other time-based interval.

The Calculation Explained

The calculator converts both the start time and the end time into a universal format (like milliseconds since an epoch). It then subtracts the start time from the end time to find the difference. If the end time is earlier than the start time, it assumes the end time is on the following day. Finally, it converts the total time difference back into a human-readable format of hours, minutes, and seconds.

How to Use the Calculator

  1. Start Time: Use the time picker to set the beginning time.
  2. End Time: Use the time picker to set the ending time.
  3. Calculate: The tool will instantly display the duration.

Real-World Example

You started work at 8:45 AM and finished at 5:15 PM.

  • Start Time: 08:45
  • End Time: 17:15
  • The calculator will determine the duration is 8 hours and 30 minutes.

Frequently Asked Questions (FAQ)

  • How does it handle overnight shifts? If you enter a start time of 10:00 PM and an end time of 6:00 AM, the calculator understands that the end time is on the next day and correctly calculates an 8-hour duration.
  • Can I calculate durations longer than 24 hours? This tool is designed for time intervals that span at most one midnight. For durations between different dates, please use our Days Between Dates Calculator.
  • How is this different from the Hours Calculator? Our Hours Calculator provides the result as a decimal (e.g., 8.5 hours), which is useful for payroll. This Time Duration Calculator provides the result in a more readable format of hours, minutes, and seconds (e.g., 8h 30m 0s).