Time Card Calculator
Find total hours from clock-in/out times.
Quickly add up shift hours from clock times (as decimals).
How the Math Works
The Time Card Calculator uses a simple arithmetic formula to determine total hours worked: hours = end - start (+12 if end < start). You subtract the clock-in time from the clock-out time. If the end time is earlier than the start time (such as working a night shift from 10 PM to 6 AM), you add 12 hours to account for the time crossing midnight. For example, clocking in at 9:00 PM and out at 5:00 AM would calculate as 5 - 9 + 12 = 8 hours.
Practical Applications
To use this calculator, enter your start and end times in the designated fields using standard 12-hour or 24-hour format. The calculator automatically applies the formula, checking if your end time is earlier than your start time to handle overnight shifts correctly. Click calculate to instantly see your total hours worked, which you can then use for payroll processing or time tracking purposes.
Day-to-Day Use
This calculator helps you accurately track your work hours without manual calculations that are prone to error. Whether you're an employee verifying your timesheet, a freelancer billing clients, or a student tracking study hours, you can quickly determine how much time you've invested in any activity. It's especially useful for shift workers, students with irregular schedules, or anyone who needs to maintain precise records of time spent on various tasks.
Worked example
8:00 to 5:00 → 9 h.
FAQ
Lunch?
Subtract your break separately.