Time Card Calculator
Calculate total hours worked, overtime, and gross pay from daily clock-in and clock-out times for a work week.
This free online time card calculator provides instant results with no signup required. All calculations run directly in your browser — your data is never sent to a server. Enter your values below and see results update in real time as you type. Perfect for everyday calculations, homework, or professional use.
The hour you clock in each day using 24-hour format (e.g. 9 for 9 AM, 13 for 1 PM).
Minutes past the hour for your clock-in time.
The hour you clock out each day using 24-hour format (e.g. 17 for 5 PM).
Minutes past the hour for your clock-out time.
Total unpaid lunch break in minutes each day.
Number of days you worked this schedule during the week.
Your regular hourly pay rate before overtime.
Weekly hours after which overtime pay kicks in (typically 40 in the US).
Results
Daily Hours Worked
8 hours
Weekly Hours
40 hours
Regular Hours
40 hours
Overtime Hours
0 hours
Regular Pay
$$1,000.00
Overtime Pay
$$0.00
Gross Weekly Pay
$$1,000.00
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Time Card Calculator. Most fields include unit selectors so you can work in your preferred unit system — metric or imperial, whichever matches your problem.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors and can produce results that are off by factors of 2, 10, or more.
Read the results
The Time Card Calculator instantly computes the output and displays results with units clearly labeled. All calculations happen in your browser — no loading time and no data sent to a server.
Explore parameter sensitivity
Try adjusting individual input values to see how the output changes. This is a quick and effective way to develop intuition about how different parameters influence the result and to identify which inputs have the largest effect.
Formula Reference
Time Card Calculator Formula
See calculator inputs for the governing equation
Variables: All variables and their units are labeled in the calculator interface above. Input fields accept values in multiple unit systems — select your preferred unit from the dropdown next to each field.
When to Use This Calculator
- •Use the Time Card Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
- •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
- •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
- •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.
About This Calculator
The Time Card Calculator is a free, browser-based calculation tool for engineers, students, and technical professionals. Calculate total hours worked, overtime, and gross pay from daily clock-in and clock-out times for a work week. It implements standard formulas and supports both metric (SI) and imperial unit systems with automatic unit conversion. All calculations are performed instantly in your browser with no data sent to a server. Use this calculator as a quick reference and sanity-check tool during design, analysis, and learning. Always verify results against primary engineering references and applicable standards for any safety-critical application.
About Time Card Calculator
The Time Card Calculator computes your weekly work hours, separates regular and overtime hours, and calculates your gross pay including overtime premiums. Simply enter your daily clock-in and clock-out times, lunch break duration, and hourly rate to see a complete weekly breakdown. This tool is indispensable for hourly employees verifying their paychecks, small business owners calculating payroll, freelancers tracking billable hours, and managers estimating labor costs. The overtime calculation uses the standard US time-and-a-half rate for hours exceeding the weekly threshold.
The Math Behind It
Formula Reference
Daily Hours
Daily Hours = (Clock Out - Clock In - Lunch) / 60
Variables: All times in minutes; Lunch = unpaid break duration in minutes
Overtime Pay
OT Pay = max(Weekly Hours - Threshold, 0) x Rate x 1.5
Variables: Threshold = usually 40 hours; Rate = regular hourly rate; 1.5 = time-and-a-half multiplier
Worked Examples
Example 1: Standard 5-day work week with overtime
An employee clocks in at 9:00 AM and out at 5:30 PM with a 30-minute lunch, 5 days a week, at $25/hour with a 40-hour overtime threshold.
The employee works exactly 40 regular hours with no overtime, earning $1,000 gross.
Example 2: 6-day week with significant overtime
Same schedule but worked 6 days instead of 5.
Working 6 days yields $1,300 gross, with $300 in overtime premium.
Common Mistakes & Tips
- !Forgetting to subtract unpaid lunch breaks from total hours, which inflates the weekly total.
- !Using 12-hour clock format instead of 24-hour; enter 17 for 5 PM, not 5.
- !Not realizing that overtime is calculated on a weekly basis in most US states, not daily.
- !Confusing gross pay with net pay; this calculator shows gross pay before taxes and deductions.
Related Concepts
Frequently Asked Questions
How is overtime calculated in the US?
Under the Fair Labor Standards Act, non-exempt employees must receive at least 1.5 times their regular hourly rate for each hour worked beyond 40 in a workweek. Some states like California also require daily overtime after 8 hours. Overtime is calculated on the regular rate, which includes most forms of compensation, not just the base hourly rate.
What is the 7-minute rounding rule?
The 7-minute rule allows employers to round clock-in and clock-out times to the nearest quarter hour. If you clock in at 8:07 AM, it rounds to 8:00 AM. If you clock in at 8:08 AM, it rounds to 8:15 AM. The Department of Labor permits this as long as the rounding practice does not consistently favor the employer over time.
Are paid breaks included in hours worked?
Yes, short paid breaks of 5-20 minutes are counted as hours worked and must be compensated. Unpaid meal breaks of 30 minutes or more, during which the employee is completely relieved of duties, are not counted. This calculator subtracts the lunch break you specify from the daily total.