Work Hours Calculator
Add work durations and subtract an unpaid break, with decimal hours for timesheets.
Calculate with your own values
Local processing. No account, uploads or saved history.
Your result
Formula & assumptions
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How to use Work Hours Calculator
- Enter your values and select the applicable mode or units; Load example shows a complete sample.
- Select Calculate, then review the result, formula and counting assumptions.
- Copy the result or download its CSV. Changing an input clears the previous result.
What this tool does
Enter elapsed durations in H:MM format, one per line. The calculator adds the durations, subtracts total break minutes and shows net H:MM plus decimal hours. These are durations, not start/end clock times: it does not infer overnight shifts, overtime or payroll rules.
Supported files, limits & important details
At most 366 durations. Breaks must be whole minutes. Decimal hours are rounded for display; no wage, labour-law or payroll calculation. Browser-local processing; no inputs are uploaded or saved. Numeric inputs are limited to an absolute value of 1 trillion. Results are estimates using JavaScript floating-point arithmetic, not certified financial or engineering calculations.
Input limits are enforced before processing. Clear removes your input and result from this page. This tool does not store your input between visits.
Keep your workflow moving
Questions about Work Hours Calculator
How do I use Work Hours Calculator?
Enter your values and select the applicable mode or units; Load example shows a complete sample. Select Calculate, then review the result, formula and counting assumptions. Copy the result or download its CSV. Changing an input clears the previous result.
Are files or text uploaded when I use Work Hours Calculator?
No. Work Hours Calculator processes your input in your browser. The tool does not upload your document or text for processing. Keep your original and review the result.
What should I check before relying on Work Hours Calculator?
Enter elapsed durations in H:MM format, one per line. The calculator adds the durations, subtracts total break minutes and shows net H:MM plus decimal hours. These are durations, not start/end clock times: it does not infer overnight shifts, overtime or payroll rules.
Need help choosing a workflow? Read our practical PDF and file guides. How your data is handled.