Time Duration Calculator

The Time Duration Calculator works out the time elapsed between a start and end time in hours and minutes, plus the total decimal hours and minutes. It handles overnight spans automatically.

Calculator

Start time

End time

Your result

NaN h NaN min

Total: — hours (NaN minutes)

Formula

duration = |end − start|, converted to hours and minutes

Examples

• 09:00 to 17:30 → 8h 30min.
• 22:00 to 06:00 → 8h 0min (overnight).

How to use this calculator

Enter a start and end time. The calculator shows hours and minutes plus totals.

Frequently asked questions

Does it handle overnight shifts?

Yes — if the end time is earlier than the start, the calculator adds 24 hours automatically.

Can I include breaks?

Not directly. Subtract break length from the result, or use the Working Hours Calculator for multi-day totals.

You may also need

Working Hours Calculator

Add up hours worked across multiple days from start and end times.

Date Calculator

Add or subtract days from a date, or find the difference between two dates including business days.

Days Between Dates

Count the total days and business days between two dates.

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