Calculate the exact length of a work shift from start and end
times, subtract unpaid breaks, handle overnight shifts, and
see regular, overtime, and decimal hours instantly.
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Calculate Your Shift Hours
Enter the start and end time of your shift, break duration,
and regular-hours limit.
Enter 0 if there is no unpaid break.
Hours above this value are shown as overtime.
Net Shift Hours
8h 00m
8.00 decimal hours
Elapsed Time8h 30m
Break Time0h 30m
Regular Hours8.00
Overtime Hours0.00
Shift Start09:00
Shift End17:30
Total Minutes Worked480 minutes
Shift TypeSame-day shift
Shift Hours Formula
The calculator finds the elapsed time between the start and
end of the shift and then subtracts the unpaid break.
Net Shift Hours = End Time − Start Time − Unpaid Break
What Is a Shift Hours Calculator?
A Shift Hours Calculator calculates how long a work shift
lasts based on a starting time and ending time. It can also
subtract unpaid breaks to show the actual amount of working time.
This is useful for checking work schedules, timesheets,
employee shifts, freelance work sessions, and other
time-based records.
Example:
Start Time: 9:00 AM
End Time: 5:30 PM
Break: 30 minutes
Elapsed time = 8 hours 30 minutes
Net work time = 8 hours
How to Use the Shift Hours Calculator
1
Enter Shift Times
Select the time your shift starts and the time it ends.
2
Add Your Break
Enter the total number of unpaid break minutes taken during
the shift.
3
Calculate
View net work time, decimal hours, total minutes, regular
hours, and overtime.
How Are Shift Hours Calculated?
The basic calculation subtracts the start time from the end
time. Any unpaid break is then deducted from the elapsed shift.
Example calculation:
7:30 AM to 4:00 PM = 8 hours 30 minutes
8 hours 30 minutes − 30-minute break
= 8 hours worked
The result is also converted to decimal hours so it can be
used more easily in time records, spreadsheets, and hourly
calculations.
Overnight Shift Hours
An overnight shift begins on one day and ends on the next.
For example, a shift beginning at 10:00 PM and ending at
6:00 AM crosses midnight.
When automatic overnight calculation is enabled, an end
time earlier than the start time is treated as occurring on
the following day.
Example:
Start = 10:00 PM
End = 6:00 AM
Elapsed shift = 8 hours
Regular Hours and Overtime
The calculator includes a customizable regular-hours limit.
If net shift time exceeds that limit, the excess is displayed
separately as overtime.
Example:
Net shift = 10 hours
Regular-hours limit = 8 hours
Regular hours = 8
Displayed overtime = 2 hours
This overtime result is a mathematical breakdown only.
Actual overtime eligibility and pay rules depend on applicable
employment rules, agreements, and local law.
How to Convert Shift Time to Decimal Hours
To convert hours and minutes into decimal hours, divide the
minutes by 60 and add the result to the whole hours.
Formula:
Decimal Hours = Hours + (Minutes ÷ 60)
7 hours 30 minutes = 7 + (30 ÷ 60)
= 7.50 decimal hours
Common Uses of a Shift Hours Calculator
Calculating employee shift durations.
Checking daily work hours.
Subtracting unpaid meal or rest breaks.
Calculating overnight work periods.
Converting work time into decimal hours.
Preparing timesheet information.
Tracking freelance or contract work sessions.
Checking regular and overtime hours.
Calculating total minutes worked.
Comparing scheduled and actual shift lengths.
Frequently Asked Questions
How do I calculate the hours in a work shift?
Subtract the shift start time from the end time and then
subtract any unpaid break duration.
Can this calculator handle overnight shifts?
Yes. With automatic overnight calculation enabled, an end
time earlier than the start time is treated as occurring on
the following day.
How do I calculate an unpaid break?
Enter the total unpaid break duration in minutes. The
calculator deducts those minutes from the elapsed shift time.
What is an 8-hour shift in decimal hours?
Exactly 8 hours is 8.00 decimal hours.
What is 8 hours and 30 minutes in decimal hours?
Eight hours and 30 minutes equals 8.50 decimal hours.
What happens if the break is longer than the shift?
The calculator shows an error because an unpaid break cannot
exceed the total elapsed shift duration.
Can I change the regular-hours limit?
Yes. Enter your preferred number of regular hours before
calculating the shift.
Does this calculator determine overtime pay?
No. It separates time mathematically using the limit you
enter. It does not determine legal overtime eligibility or
pay rates.