Leave at 5:30 PM
8 hours work + 30-minute unpaid lunch
What Time Should You Clock In?
Know when you want to leave? Work backwards from your desired clock-out time, required work and unpaid breaks to find the time you need to start.
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Plan backwards
Clock-in time
min
You should clock inSame day
9:00 AM
8 hr work + 30 min unpaid break
The formula
How this calculator works
Clock-in time = desired clock-out − required work − unpaid breaks
The calculator subtracts both paid work time and any unpaid break that extends the workday. If the result crosses midnight, it labels the clock-in as the previous day.
Real examples
Common workday calculations
Clock in 9:00 AM
Leave at 4:00 PM
7 hr 30 min work + 30-minute break
Overnight departure
Leave 6:00 AM after 8 hours + 30-minute break
Good to know
Edge cases and common mistakes
- A result later than the desired clock-out belongs to the previous day.
- Paid breaks are already inside required work time and should not be added again.
- Use the minute field for schedules such as 7 hours 45 minutes.
- This calculator plans a single continuous shift, not split shifts.
Answers
Frequently asked questions
What time should I clock in to leave at 5:30 PM?
For 8 paid hours and a 30-minute unpaid break, clock in at 9:00 AM.
Does lunch make me clock in earlier?
An unpaid lunch extends the total span, so you must clock in earlier to keep the same departure time. A paid lunch does not.
Can this calculate an overnight shift?
Yes. When subtraction crosses midnight, the result is identified as the previous day.