Time Card Calculator
How this time card calculator works
Enter your clock-in and clock-out times, the length of any unpaid break, and (optionally) your hourly rate. The calculator figures out the total hours worked, splits them into regular and overtime portions, and computes your pay for the shift.
The formula
Worked hours = (Clock out − Clock in − Break) ÷ 60
Regular hours = min(Worked hours, 8)
Overtime hours = max(Worked hours − 8, 0)
Overtime rate = Hourly rate × 1.5
Total pay = (Regular hours × Hourly rate) + (Overtime hours × Overtime rate)
Handling overnight shifts
If clock-out is earlier than clock-in (for example, in at 22:00 and out at 06:00), the shift crosses midnight. The calculator detects this and adds 24 hours to the checkout time, so the elapsed time is always correct.
Overtime rules used here
This tool treats any hours beyond 8 in a single day as overtime at 1.5× pay. That matches the daily overtime rule used in several US states (like California) and by many union contracts. Under US federal law (FLSA), overtime is officially owed after 40 hours in a workweek — this calculator focuses on a single shift, so it applies the common 8-hour daily threshold.
FAQ
How are overtime hours calculated?
Overtime is any time worked beyond 8 hours in a single day. This calculator treats all hours above 8 as overtime, paid at 1.5 times your regular hourly rate. For example, if you work 10 hours in a day, the first 8 are regular and the remaining 2 are overtime. Note that US federal law (FLSA) actually triggers overtime after 40 hours in a workweek — many employers also pay daily overtime after 8 hours, which is what this tool models.
What is time and a half?
Time and a half means you earn 1.5 times your normal hourly rate for overtime hours. If your regular rate is $20/hour, your overtime rate is $20 × 1.5 = $30/hour. It is the most common overtime multiplier under US federal labor law for hours worked beyond 40 in a workweek, and many employers apply the same 1.5× rate to daily hours beyond 8.
How do I calculate pay for an overnight shift?
When your clock-out time is earlier than your clock-in time, the shift crosses midnight. This calculator automatically treats that as a next-day checkout by adding 24 hours. For example, clocking in at 22:00 (10 PM) and out at 06:00 (6 AM) gives an 8-hour shift. The break duration is then subtracted, and any hours beyond 8 are paid at the overtime rate.