About This Tool
The Work Hours Calculator is a simple yet powerful tool for tracking the total hours worked between a start and end time, often including break deductions. It is ideal for employees who need to log their hours for payroll, freelancers billing clients by the hour, or managers monitoring team attendance. The calculator handles different time formats (12-hour AM/PM or 24-hour) and can compute hours across midnight (e.g., a night shift from 10 PM to 6 AM). It also calculates overtime if you set a standard workday threshold. By automating the math, it reduces errors in timesheets and ensures fair compensation. For hourly workers, this tool is indispensable for verifying paychecks and planning schedules.
How It Works
The Work Hours Calculator subtracts the start time from the end time to get the total elapsed time, then subtracts any break time. The basic formula is: Total Hours Worked = (End Time – Start Time) – Break Duration. Times are converted to decimal hours for accuracy. For example, starting at 9:00 AM and ending at 5:30 PM with a 30-minute unpaid lunch gives 8.0 hours worked (8.5 – 0.5). For overnight shifts, the calculator adds 24 hours to the end time if it is earlier than the start time.
Examples
- An employee works from 8:15 AM to 5:00 PM with a 1-hour unpaid break. The total time is 8.75 hours minus 1 hour = 7.75 hours worked (7 hours and 45 minutes).
- A night shift worker starts at 11:00 PM and ends at 7:00 AM the next day with no break. The calculator adds 24 hours to 7:00 AM, so elapsed time is 8 hours worked.
Pro Tips
- Always round to the nearest quarter-hour (0.25, 0.5, 0.75) for payroll unless your employer uses exact minutes.
- Double-check that you enter times in the correct format (AM vs. PM) to avoid off-by-12-hour errors.
- If you take multiple breaks, add them together and enter the total break time to keep it simple.