Time Duration Calculator (Hours & Minutes)
Calculate the exact time difference between two times in hours and minutes. Choose between 24-hour or 12-hour AM/PM format.
Time Duration
Time format
If the end time is earlier than the start time, the calculator assumes the next day.
Note: 24:00 is the same as 00:00 (next day).
Quick Time Facts
Useful conversions
How this time duration calculator works
This tool calculates the difference between two clock times and returns the duration in hours and minutes. You can enter times using either 24-hour format or the 12-hour AM/PM system. To calculate reliably, the tool converts each time to a total minute value and then compares them.
If your end time is earlier than your start time, the calculator treats the end time as happening on the next day. This is helpful for overnight shifts, late events, or any schedule that crosses midnight.
Typical uses
- Work and shifts: How long is a shift from a start time to an end time?
- Meetings and events: How many hours and minutes did a meeting last?
- Travel timing: What is the travel duration between two times?
- Training and study: How long did a workout or focus session take?
Related Calculators
If you also work with dates (not just times), you may want to calculate the number of days between two dates with our Days Between Dates Calculator or plan future dates using the Add or Subtract Date Calculator. To check weekdays for scheduling, the Weekday Calculator can be useful, and if you plan by calendar weeks, try the Week Number Calculator.
These tools complement each other when you plan schedules that involve both dates and times.
- How much time remains before a deadline is reached?
- How long is a trip between two travel dates?
- Measure the total days for a project timeline.
- What date is 14 days from today?
- Subtract 30 days from a target date.
- Plan follow-up dates for appointments.
- What weekday is a meeting date?
- Find out which weekdays are best suited for travel plans.
- Find the weekday for an important deadline.
- Which ISO calendar week does today belong to?
- In which ISO week does a project officially begin?
- Organize schedules and timelines based on ISO week numbers.
FAQ
How does the time duration calculator work?
The calculator converts the start time and end time into total minutes from midnight and then computes the difference. The result is shown in hours and minutes, and also as a total number of minutes.
What happens if the end time is earlier than the start time?
If the end time is earlier, the calculator assumes the end time is on the next day. This is useful for overnight shifts or events that pass midnight.
Can I use 12-hour AM/PM and 24-hour format?
Yes. You can switch between 24-hour time and 12-hour AM/PM. The calculator handles both formats and produces the same duration result.
Is 24:00 a valid time?
24:00 represents midnight at the end of a day and is equivalent to 00:00 on the next day. If you enter 24:00, it is treated as the next day at 00:00.
Does this calculator include seconds?
No. This tool focuses on hours and minutes for simplicity. If you need seconds-level precision, you would need a time calculator that supports seconds.
Do time zones or daylight saving time affect the result?
No. This tool calculates the difference between clock times (hours and minutes). It does not apply time zone conversions or daylight-saving rules.