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Precision · Instant · Private

Time Duration Calculator

Find how much time passes between a start and end time — in hours and minutes. Handles overnight spans and shows the decimal hours too.

SYSTEM ● ONLINE · LOCAL COMPUTE · ZERO UPLOAD
UNIT // TIME.DURATIONLIVE
Duration
8h 30m
8.50 hours
8
Hours
30
Minutes
8.50
Decimal hours
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Quick Answer

How do you calculate the time between two times?

// Answer

Convert both times to minutes since midnight, subtract the start from the end, and convert back to hours and minutes. From 9:00 to 17:30 is 510 minutes = 8 hours 30 minutes. If the end time is earlier than the start, it is treated as the next day (an overnight shift).

Why use this tool

Track hours easily

Calculate work shifts, study sessions, billable hours, or any time span. The decimal hours output (8.50) is handy for timesheets and payroll. Overnight spans are handled automatically.

FAQ

Frequently asked questions

Yes. If the end time is before the start time, it assumes the span crosses midnight into the next day.
The duration expressed as a decimal (e.g. 8h 30m = 8.5 hours), commonly used for timesheets and billing.
For spans longer than 24 hours, use the Date Difference calculator instead.
Yes, calculations run in your browser.
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