Shift Duration Calculator

How to calculate shift duration?

Calculating your actual working hours involves determining the total time elapsed between your clock-in and clock-out times, then subtracting any unpaid break periods. This ensures you are compensated accurately for the time spent on the job.

Total Hours = (End Time - Start Time) - Break Duration

Using the Shift Duration Calculator: an example

Scenario: An employee clocks in at 8:00 AM and clocks out at 5:00 PM, taking a standard 60-minute unpaid lunch break during the day.

Step-by-step calculation

1. Convert to minutes: 8:00 AM is 480 minutes from midnight; 5:00 PM is 1020 minutes.
2. Calculate total elapsed time: 1020 - 480 = 540 total minutes elapsed.
3. Subtract the break: 540 minutes - 60 minutes = 480 minutes of actual work.
4. Convert back to hours: 480 minutes divided by 60 = 8 total hours worked.

Frequently Asked Questions

How do I calculate shifts that cross over midnight?

For overnight shifts, add 24 hours to the end time before performing the subtraction. This accounts for the date change and provides the correct total duration.

Should I round my start and end times to the nearest 15 minutes?

Many companies use the "7-minute rule," where times are rounded to the nearest quarter-hour for payroll. Always check your specific company policy regarding time clock rounding.

What are the standard labor law break requirements?

While requirements vary by region, many labor laws mandate a 30-minute unpaid meal break for shifts over 5 or 6 hours, plus additional paid 10-15 minute rest breaks.