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Working Hours Calculator
Count exact working minutes across a civil date interval with selected weekdays and an optional lunch break.
Civil dates and HH:MM times, Weekday and daily-window options
working-hours.json
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the inclusive start and exclusive end date and time using strict YYYY-MM-DD and HH:MM.
- Choose weekdays 1–7 for Monday–Sunday, a same-day work window and an optional contained lunch.
- Select Calculate working time and download the full daily report.
Examples
Monday 10:00 to Tuesday 15:00 with 09:00–17:00 work and 12:00–13:00 lunch gives 11 working hours.
Limitations
- Years 0001–9999; 00:00–23:59 clocks; at most 3660 days between input dates and 3661 daily rows; 512 total input UTF-16 units, 1 MiB JSON and 30 seconds.
- The end is exclusive; end-midnight does not add a row for that date. Equal start/end returns zero minutes and no rows. Weekdays are a unique comma-separated list without spaces.
- Work and enabled lunch have positive same-day lengths; lunch must be wholly inside work. No overnight shifts, timezone, daylight-saving or holiday inference.
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