Shift Duration Calculator

8 Hour Shift Calculator

Calculate shift duration, subtract unpaid breaks, and check total paid work hours.

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Shift Details

Enter your times and breaks

Common Schedules

Enter shift times, breaks, and click Calculate.

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What counts as an 8-hour shift?

An 8-hour shift measures 8 hours from your start time to your end time. If your shift includes an unpaid break (like a 30-minute lunch), you will be paid for 7.5 hours. To receive 8 hours of paid time with an unpaid 30-minute break, your shift duration must be 8.5 hours (e.g., 9:00 AM to 5:30 PM).

Worked Hours = Shift Duration − Unpaid Break Time
Worked Example:

9:00 AM to 5:00 PM is an 8-hour shift. Subtracting a 30-minute unpaid lunch results in 7.5 paid hours.

Is 9 to 5 an 8-Hour Shift?

Historically, the concept of the 8-hour workday arose in the early 19th century during the Industrial Revolution, popularized by Welsh social reformer Robert Owen under the slogan: "Eight hours labor, Eight hours recreation, Eight hours rest." Today, a typical 9:00 AM to 5:00 PM shift spans exactly 8 hours in total duration. However, if your employer requires a 30-minute or 60-minute unpaid lunch break, a 9-to-5 shift actually yields only 7.5 or 7.0 paid hours of work. To ensure you receive 8 full paid hours, you would commonly work a shift spanning 8.5 hours in total duration (for example, starting at 8:30 AM and ending at 5:00 PM, or 9:00 AM to 5:30 PM, incorporating an unpaid 30-minute lunch break). You can calculate your start, end, and break totals with our work hours calculator or utilize the lunch break calculator.

Unpaid vs. Paid Breaks

Labor guidelines (such as the U.S. Department of Labor regulations) distinguish between short rest breaks and longer meal periods. Rest breaks of short duration (typically 5 to 20 minutes) must be counted as paid hours and cannot be deducted from an employee's timesheet. To aggregate multiple short rest periods in one day, check out our break time calculator. Bona fide meal periods (typically 30 minutes or longer) are not counted as work hours and are unpaid, provided the employee is completely relieved from duty for the purpose of eating regular meals. You can track all these shifts, breaks, and daily totals dynamically by downloading the Hours Tracker mobile app.

8-Hour Shift Examples

Standard 9:00 AM to 5:00 PM Shift

Start: 9:00 AM

End: 5:00 PM

Lunch: 30 mins (unpaid)

7.50 Paid Hours (7h 30m)

8 hours shift duration minus 30 minutes break

8-Hour Paid Day (8:30 AM to 5:00 PM)

Start: 8:30 AM

End: 5:00 PM

Lunch: 30 mins (unpaid)

8.00 Paid Hours (8h 00m)

8.5 hours shift duration minus 30 minutes break

Overnight Shift (10:00 PM to 6:00 AM)

Start: 10:00 PM

End: 6:00 AM

Lunch: 30 mins (unpaid)

7.50 Paid Hours (7h 30m)

Crosses midnight, 8 hours total duration

Common Use Cases

Employees Checking Shifts

Verify hours worked and break deductions match your company timesheet entries before submitting.

Freelancers Preparing Invoices

Convert minutes to decimal hours and multiply by your hourly rate to invoice clients accurately.

Contractors Estimating Pay

Log daily hours, meal breaks, and calculate estimated paycheck earnings based on standard pay rates.

Timesheet Preparation

Total weekly shift values and compute regular vs. overtime periods for simple payroll processing.

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Lunch Break Calculator

Subtract lunch break from your shift to get net work hours.

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Time Card Calculator

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Overtime Calculator

Calculate overtime pay from regular rate and extra hours worked.

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Related Guides

How to Calculate Work Hours How to Calculate Lunch Breaks in Work Hours

8 Hour Shift Calculator FAQ

Quick answers about using the 8 hour shift calculator.

Is 9 to 5 an 8-hour shift?

Yes, 9:00 AM to 5:00 PM is exactly 8 hours. However, if you take an unpaid 30-minute lunch break, your paid work time is 7.5 hours.

How do I calculate an 8-hour shift end time?

If you want to work exactly 8 hours with an unpaid 30-minute lunch, you need to stay for 8.5 hours. Add 8.5 hours to your start time (e.g., start at 8:00 AM, end at 4:30 PM).

Does a lunch break count as work hours?

Typically, meal breaks (30 minutes or longer) are unpaid and do not count as work hours. Short rest breaks (10-15 minutes) are often paid depending on company policy and local rules.

How does the calculator handle overnight shifts?

If your shift crosses midnight (for example, starting at 10:00 PM and ending at 6:00 AM), the calculator automatically detects that the shift ends the following day and computes the elapsed duration correctly.

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Use our free, browser-based tools for timesheet, time card, and overtime calculations. No signup required.

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