Productivity tools
Timesheet Calculator
Calculate total work hours from daily clock-in and clock-out times with break deductions locally in your browser.
Track your work hours without a spreadsheet.
Add one row per day with the date, start time, end time, and break length in minutes. The calculator handles overnight shifts and sums daily hours into a weekly total with both HH:MM and decimal formats. Everything runs locally in your browser, so your timesheet data is not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
What does the timesheet calculator show?
Add one row per day with the date, start time, end time, and break length in minutes. The calculator returns the total hours worked in HH:MM and decimal formats, plus a daily breakdown. For example, three 8-hour days with 30-minute breaks each give 22h 30m total (22.50 hrs).
How does the calculator handle overnight shifts?
If the end time is earlier than or equal to the start time, the calculator assumes the shift crosses midnight and adds 24 hours before subtracting the break. For example, a 22:00 start with a 06:00 end and 30-minute break gives 7h 30m.
Which inputs are accepted?
Enter dates in YYYY-MM-DD format, times in 24-hour HH:MM format, and break minutes as a whole number from 0 to 1440. Up to 14 daily entries are supported. Missing required values, invalid time formats, and values outside these ranges show a clear error instead of a result.
Does my timesheet data leave my browser?
No. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the dates, times, or break values you enter.