How to use this calculator
Calculate night hours and an extra overnight wage premium. Enter your values into the fields above. Your result and individual components update immediately without leaving this page.
The formula
Night premium = night-window hours × hourly rate × premium percentage ÷ 100. Gross shift pay = all shift hours × base rate + night premium. Breaks and other differentials are not deducted in this tool.
Worked example
A 8:00 PM–6:00 AM shift is 10 hours; an overnight window of 10:00 PM–6:00 AM covers 8 hours. At $20/h and a 15% premium, gross pay is $224.
Frequently asked questions
What hours count as night hours?
There is no universal definition. Set the window specified by your employer, agreement or local rule.
Does the tool remove unpaid breaks?
No. It assumes all entered shift hours are paid. Use the Shift Length Calculator separately for unpaid break adjustments.
Related free tools
Important: This calculator provides arithmetic estimates, not employment, tax or legal advice. Check local rules and your own agreement before relying on a payroll figure.