How does it handle an overnight duration, like 10 PM to 6 AM?

If the end time is earlier than the start time, the calculator assumes the end time falls on the next day and adds 24 hours before subtracting, so 22:00 to 06:00 correctly returns 8h 0m instead of a negative duration.

Can I enter times in 12-hour format with AM/PM?

Yes, both 24-hour (17:30) and 12-hour (5:30 PM) formats are accepted; the calculator normalizes the input before computing the difference.

Time Duration Calculator

Find the duration between two times of day.

How this is calculated

Duration = endTime − startTime (rolls over to next day if end < start)

Assumptions used in this calculation

Overnight ranges: If the end time is earlier than the start time, the calculator assumes it falls on the next day.

About this calculator

The time duration calculator finds the hours and minutes between a start and end time, automatically handling overnight ranges.

Worked example

9:00 AM to 5:30 PM

Result: 8h 30m

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About this calculator

Frequently asked questions

How does it handle an overnight duration, like 10 PM to 6 AM?

Can I enter times in 12-hour format with AM/PM?

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