Time Clock Calculator
Enter your clock-in time, clock-out time and break to see the hours worked in hours and minutes and in decimal hours.
Last updated November 2, 2026
Result
8:00 hours worked
8 decimal hours
Show the work
- Time between clock in and clock out: 9:00 AM to 5:30 PM = 8:30.
- Minus the unpaid break of 30 minutes: 8:30 - 0:30 = 8:00.
- Decimal hours: 480 minutes / 60 = 8 hours.
How hours between clock in and clock out are calculated
hours worked = clock out − clock in − unpaid break
The calculator measures the minutes from clock in to clock out, subtracts the unpaid break, and shows the result as hours and minutes and as decimal hours. A clock-out that is earlier than the clock-in is read as the next day.
Behind the scenes everything is whole minutes. Clock in and clock out are read as minutes since midnight, the break is subtracted, and only the final total is turned into hours and minutes or into decimal hours. Working in whole minutes keeps the arithmetic exact until that last step.
Decimal hours are the minutes divided by 60, rounded to two decimals, so 7 hours 45 minutes is 7.75 hours.
See how we calculate for the formulas, sources and review schedule behind every calculator.
Also useful alongside this calculator: Military Time Converter, Time Duration Calculator and Time Calculator.
Minutes as decimal hours
Payroll and spreadsheet systems usually want decimal hours rather than 7:45. The conversion is minutes ÷ 60: 15 minutes is 0.25, 30 minutes is 0.50 and 45 minutes is 0.75. Other minutes do not divide evenly, so the decimal is rounded to two places: 10 minutes is 0.17, 20 minutes is 0.33, 40 minutes is 0.67 and 50 minutes is 0.83.
That rounding can matter when you multiply by a pay rate. A shift of 7 hours 20 minutes is exactly 7⅓ hours, so at $15 an hour it earns $110.00. Using the rounded 7.33 hours gives $109.95, five cents less. For pay, multiply the exact minutes (minutes × rate ÷ 60) or keep more decimals, and use two-decimal hours for display.
Overnight shifts, equal times and breaks
A shift that ends after midnight is entered as it appears on the clock, such as 10:00 PM in and 6:00 AM out. Because 6:00 AM is earlier than 10:00 PM, the calculator adds one day and counts 8 hours. With a 30-minute break that is 7 hours 30 minutes, or 7.50 hours.
If the clock-in and clock-out times are identical, the result is 0 minutes, not 24 hours, because a time of day alone cannot tell a full-day shift from no shift. If the break is longer than the time between clock in and clock out, the calculator reports an error instead of showing negative hours.
From one shift to a pay week
To total a week, add the minutes of each day rather than the rounded decimals. Five shifts of 7:45 add up to 38 hours 45 minutes, which is 38.75 decimal hours. A week with different start times and a daily break is easier to track on the time card calculator, and the overtime calculator shows which hours count as overtime.
How to use the Time Clock Calculator
- Enter the clock-in time.
- Enter the clock-out time.
- Add the unpaid break in minutes.
- Read the hours worked, then use Copy, Print or Share.
Worked example
Clocking in at 8:15 AM and out at 4:45 PM is 8 hours 30 minutes, or 510 minutes. After a 45-minute break that leaves 465 minutes. Dividing by 60 gives 7 hours and 45 minutes, and 465 ÷ 60 = 7.75 decimal hours. At $20 an hour, 7.75 hours earns $155.00.
| Clock in | Clock out | Break | Hours worked |
|---|---|---|---|
| 9:00 AM | 5:00 PM | 30 min | 7:30 (7.50) |
| 9:00 AM | 5:30 PM | 30 min | 8:00 (8.00) |
| 8:00 AM | 4:00 PM | 60 min | 7:00 (7.00) |
| 7:00 AM | 3:30 PM | 30 min | 8:00 (8.00) |
| 10:00 PM | 6:00 AM | 0 min | 8:00 (8.00) |
| 8:15 AM | 4:45 PM | 45 min | 7:45 (7.75) |
| 10:00 PM | 6:00 AM | 30 min | 7:30 (7.50) |
| 9:00 AM | 9:00 AM | 0 min | 0:00 (0.00) |
Frequently asked questions
What if I clock out after midnight?
If the clock-out time is earlier than the clock-in time, the calculator treats it as the next day, so 10:00 PM to 6:00 AM is 8 hours.
Is the break paid?
The break you enter is treated as unpaid and is subtracted. Leave it at 0 if the break is paid.
Why is 7:45 equal to 7.75 and not 7.45?
Minutes are out of 60, not 100. 45 minutes is 45 ÷ 60 = 0.75 of an hour. A decimal of 7.45 would be 7 hours and 27 minutes, because 0.45 × 60 = 27.
Does the calculator round to the nearest quarter hour?
No. 8:07 stays 8 hours 7 minutes. Some employers round punches to the nearest 5, 10 or 15 minutes. If yours does, round the clock times first and then enter them, and check your employer’s policy for the rule that applies to you.
Are my times stored or sent anywhere?
No. The calculation runs in your browser and nothing you enter is saved or uploaded.