How to use this calculator
Estimate worked duration from a start time, end time, and break length.
How the calculation works
- Enter start and end times.
- Add break minutes.
- Review hours, minutes, and decimal hours.
Example
8:30 to 17:15 with a 45 minute break equals 8.00 hours.
Understanding your result
Use the output as a practical starting point, then review it before using it in an important workflow.
Assumptions and limitations
- This does not apply payroll or labor rules.
- Crossing midnight is supported for simple shifts.
Frequently asked questions
Does this require an account?
No. The core tool works without creating a Tool2Do account.
Is my input included in share links or analytics?
No. Tool2Do share actions use the tool page URL and safe metadata, not private values or uploaded files.