Time Duration Calculator

The length of time between two clock times.

Quick answer: Calculate the time duration between two hours. Free online time clock calculator to find hours and minutes between start and end times.

Duration8h 30m
Total minutes510
Decimal hours8.5

computed locally — nothing leaves your browser

Find the elapsed time between two clock times, shown as hours and minutes, total minutes, and decimal hours — handling times that cross midnight.

How it works

  1. Enter the starting time of your event.
  2. Enter the ending time of your event.
  3. View the total duration expressed in hours and minutes.

Frequently asked questions

Does it handle overnight spans?

Yes — an end time earlier than the start is treated as the next day.

What are decimal hours?

Hours as a decimal (8h 30m = 8.5), the format used by payroll and time-tracking systems.

Can I add dates too?

For spans across multiple days, use the Hours Calculator or Days Between Dates tool.

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