Quick answerA time card calculator totals daily work periods, subtracts unpaid breaks, separates regular and overtime hours, and estimates gross pay from the entered hourly rate and overtime rule.
Calculating weekly hours and overtime
Each day's paid time is the interval between clock-in and clock-out minus the unpaid break. Overnight shifts are carried into the next day when the ending time is earlier than the starting time. The daily totals are added before the selected overtime threshold is applied.
A common weekly model pays the base rate up to a threshold and a multiplier above it. Actual law or company policy may also require daily overtime, double time, special rest-day treatment, or a different workweek definition. The calculator uses the rule shown in the form.
Decimal hours and payroll records
Payroll systems often express time in hundredths of an hour. Fifteen minutes is 0.25 hour, 30 minutes is 0.50, and 45 minutes is 0.75. Clock minutes should be divided by 60 rather than written after a decimal point.
Keep original clock records even when the final payroll total is rounded. Employer rounding policies should be applied consistently and in accordance with applicable rules. This calculator totals the exact entered minutes before displaying decimal hours.
How to use this overtime & time card calculator
- Enter each shift; overnight shifts are supported.
- Set unpaid break minutes for each day.
- Set the weekly threshold and multiplier that apply to your situation.
Formula and method
The default 40-hour threshold and 1.5 multiplier reflect a common U.S. federal calculation for covered non-exempt workers, but eligibility and regular-rate rules are not determined by this tool.
Weekly time card example
Suppose five shifts each contain 8 hours 30 minutes of paid time. The weekly total is 42.5 hours. With a 40-hour threshold, 40 hours are regular and 2.5 hours are overtime.
At $20 per hour with a 1.5 multiplier, regular pay is $800 and overtime pay is $75, for estimated gross pay of $875 before tax and deductions.
Common mistakes to avoid
- Writing 7 hours 45 minutes as 7.45 hours.
- Subtracting a break twice when the entered end time already excludes it.
- Applying weekly overtime to each day independently.
- Assuming one overtime rule applies in every location and industry.
Accuracy and practical limits
The tool totals entered minutes and applies the selected threshold and multiplier exactly. It does not determine legal coverage, daily overtime, premiums, paid breaks, rounding policies, holidays, taxes, or payroll deductions. Confirm the applicable employment rule.
Primary references: Check current federal coverage and calculation guidance at the U.S. Department of Labor Wage and Hour Division.
Frequently asked questions
Does the calculator decide if I am entitled to overtime?
No. Coverage, exemptions, regular rate, and state rules require a legal or payroll determination.
How are overnight shifts handled?
An end time earlier than the start is treated as occurring the next day.
Does overtime start after eight hours in a day?
Not in the default model. Change or extend the model for a jurisdiction or contract with daily overtime rules.