Work Hours Calculator
Calculate work hours between two times — handles overnight shifts, breaks, and overtime. Time parser (12h AM/PM and 24h), break deduction, daily overtime threshold with 1.5x multiplier, regular vs overtime pay, effective hourly rate, summary stats, 6 shift presets, break presets, text + CSV export, history (localStorage), shareable URL. 100% client-side.
About Work Hours Calculator
Calculate work hours between two times — handles overnight shifts, breaks, and overtime. Time parser (12h AM/PM and 24h), break deduction, daily overtime threshold with 1.5x multiplier, regular vs overtime pay, effective hourly rate, summary stats, 6 shift presets, break presets, text + CSV export, history (localStorage), shareable URL. 100% client-side. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.
FAQ
How does the work hours calculator work?
Enter your start time, end time, and break minutes. The tool parses both times into minutes since midnight, optionally adds 24 hours when end < start (overnight shift), subtracts the break, and reports the worked hours. With an hourly rate, it splits the worked hours into regular vs overtime using the threshold you set (default 8 hours/day) and computes regular pay, overtime pay (rate × multiplier, default 1.5x), and total pay.
How are overnight shifts handled?
If end time is earlier than start time (e.g. start 22:00, end 06:00) and the overnight shift toggle is on, the tool automatically treats the end time as the next day and adds 24 hours. You can also enable auto-detect — the calculator will check end < start and flag it as overnight automatically.
How is overtime calculated?
Daily overtime uses the threshold you set (default 8 hours). Any worked hours above the threshold are paid at the overtime rate, which is your hourly rate × the multiplier (default 1.5x). Regular hours are paid at the straight hourly rate. Total pay = regular pay + overtime pay. The effective hourly rate is total pay ÷ worked hours.
What extra features does this tool have compared to others?
(1) Time parser supporting both 12h AM/PM and 24h formats. (2) Time formatter (12h and 24h output). (3) Overnight shift auto-detect. (4) Break deduction. (5) Daily overtime threshold calculator. (6) Regular vs overtime pay calculator. (7) Overtime rate multiplier. (8) Date format selector (12h/24h). (9) Render as text report. (10) Render as CSV. (11) Copy + Download .txt + Download CSV + Share link + Clear. (12) History (localStorage, max 20). (13) Shareable URL (inputs in hash). (14) Summary stats (worked hours, regular, overtime, total pay, effective hourly rate). (15) 6 common shift presets (9-5, 8-4, 10-6, night 22-6, etc.). (16) Break presets (0, 15, 30, 60, 90 minutes).
Is my data sent anywhere?
No. Every calculation runs 100% in your browser. History is stored in localStorage on this device only. Nothing is uploaded — the share link encodes inputs in the URL hash which never leaves the device unless you copy and send it.
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