Free · Everyday · Date & Time

Time Duration Calculator

Calculate elapsed time between two clock times, including overnight spans and break deductions.

  • Checked formula
  • Private in your browser
  • No signup
Calculator inputs

Enter your values

Result

Your calculation

Net duration
8h 0m
Decimal hours
8
Gross duration
8h 30m
Crosses midnight
Yes

How to use this calculator

  1. Enter the values and choose the units that match your situation.
  2. Calculate to see the primary answer and useful conversions.
  3. Review the assumptions before using the result for a project or decision.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.