How does overnight calculation work?

When end time is earlier than start time or overnight is checked, 24 hours are added. Example: 10 PM to 6 AM equals 8 hours.

What are decimal hours?

Decimal hours express time as a decimal. Example: 1 hour 30 minutes equals 1.50 decimal hours. Used for timesheets and billing.

Can I calculate across multiple days?

This handles same-day and overnight durations. For multi-day, add 24 hours per additional day.

How do I add or subtract time?

Switch to the Add/Subtract tab, enter base time, choose operation, enter hours and minutes. Result wraps around midnight.

Time Duration Calculator — Hours Between Times

Time Duration Calculator

Quick Answer

Subtract the start time from the end time to get the duration in hours and minutes. For overnight shifts (end time earlier than start), add 24 hours. Decimal hours = minutes ÷ 60 (e.g., 1h 30m = 1.50 hours).

Also searched as: time duration calculator

Start Time

End Time

Overnight (end time is next day)

Duration

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Decimal Hours

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Total Minutes

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Total Seconds

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Calculating Time Duration Made Easy

Knowing the exact duration between two times is essential for countless everyday tasks. Whether tracking work hours for a timesheet, calculating flight duration, or managing overnight shifts, this calculator gives precise results instantly.

The duration calculator handles overnight spans correctly. If start time is 10:00 PM and end time is 6:00 AM, it returns 8 hours. Results are shown in hours, minutes, seconds, and decimal hours commonly required for timesheets and billing.

The add/subtract feature is equally useful. Enter a base time and amount to add or subtract. The calculator wraps around midnight, indicating whether the result falls on the same day, next day, or previous day. Both tools update results live as you type.

Time Duration Calculator

Calculating Time Duration Made Easy

Frequently Asked Questions

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