Date & Time
Hours Calculator (Time Card)
Calculate hours worked from start time, end time, and break duration. Decimal and HH:MM output. Handles overnight shifts.
Shift times
Hours worked
7:30
That is 7.5 decimal hours, or 450 minutes.
Frequently Asked Questions about the Hours Calculator (Time Card)
How do I calculate hours worked?
Enter your start time, end time, and any unpaid break minutes. The calculator subtracts the break from the total elapsed time and shows your result in both hours-and-minutes (e.g., 8:30) and decimal hours (e.g., 8.5). It handles overnight shifts automatically.
What are decimal hours?
Decimal hours express your total work time as a single number instead of hours and minutes. For example, 8 hours 30 minutes equals 8.5 decimal hours because 30 minutes is 0.5 of an hour. Most payroll systems and timesheets use decimal hours for calculations.
How does the calculator handle overnight shifts?
When the end time is earlier than the start time, the calculator assumes the shift crossed midnight and adds 24 hours to the elapsed time. For example, 10:00 PM to 6:00 AM correctly returns 8 hours. If start and end are identical, the result is 0 hours, not 24.
Should I include breaks in my work hours?
Unpaid breaks (like a 30-minute lunch) should not count as worked time. Enter the unpaid break duration in minutes and the calculator deducts it automatically. If your break time is longer than your shift duration, the calculator will not return a result, since worked time cannot be negative.
How do I convert my hours to a paycheck amount?
Multiply your decimal hours by your hourly rate. At $20/hr for 8.5 decimal hours: 8.5 x $20 = $170. Under federal law, multiply hours above 40 per week by 1.5 x your base rate. For example, 2 overtime hours at $20/hr adds 2 x $30 = $60.