What Is a Time Card Calculator?
You work Monday through Friday, 8:00 AM to 5:00 PM with a 30-minute unpaid lunch. That is 8 hours per day, 40 hours per week. But this week you also worked Saturday from 9:00 AM to 1:00 PM. Your total is 44 hours. At $20 per hour, your regular pay is $800 and your 4 overtime hours at 1.5x rate add $120, for a gross of $920. Miss those 4 overtime hours and you lose $60. Miscalculate the overtime rate and you could be underpaying or overpaying by hundreds of dollars over a year.
Under the Fair Labor Standards Act (FLSA), covered nonexempt employees must receive overtime pay at 1.5 times their regular rate for hours worked over 40 in a workweek. The Department of Labor enforces this rule, and violations can result in back wages plus penalties. According to Paylocity's 2026 overtime pay guide, the FLSA salary threshold for exempt employees was raised to $1,128 per week ($58,656 annually) on January 1, 2025. Employees earning below this threshold are generally entitled to overtime pay. This calculator handles the arithmetic automatically, separating regular from overtime hours and computing gross pay.
For adding and subtracting individual time values without a weekly structure, our Time Calculator handles arbitrary time arithmetic.
What This Calculator Does
Enter clock-in and clock-out times for each day of the week, along with any unpaid break time. The calculator totals all hours, separates regular from overtime hours based on your threshold, and multiplies by your hourly rate to produce a gross pay estimate.
Inputs Required
- Start and End Time: Clock-in and clock-out times for each workday
- Break Minutes: Unpaid break duration deducted from each day's total
- Hourly Rate: Your pay rate per hour
- Overtime Threshold: Weekly hours before overtime applies (default is 40 per FLSA)
Outputs Provided
- Daily Hours: Net hours worked each day after deducting breaks
- Total Weekly Hours: Combined hours across all seven days
- Regular vs Overtime Hours: Split based on the overtime threshold
- Gross Pay: Regular pay plus overtime pay at 1.5x rate
How the Calculation Works
For each day, the calculator converts the start and end times to minutes since midnight and subtracts the start from the end. The unpaid break in minutes is then deducted. All daily totals are summed for the weekly total.
Daily Hours = (End Time - Start Time) - Break Minutes
Weekly Total = Sum of all daily hours
Regular Pay = min(Weekly Hours, Threshold) x Rate
Overtime Pay = max(0, Weekly Hours - Threshold) x Rate x 1.5
Overtime is calculated at 1.5 times the regular rate for hours exceeding the threshold. The FLSA sets this threshold at 40 hours per workweek for most nonexempt employees. A workweek is defined as a fixed and regularly recurring period of 168 hours (7 consecutive 24-hour periods). For calculating net take-home pay after taxes and deductions, our Take-Home Paycheck Calculator handles tax withholding estimates.
How to Use the Calculator
- Enter your clock-in and clock-out time for each day you worked
- Enter any unpaid break time in minutes for that day (leave at 0 if breaks are paid)
- Leave a day blank if you did not work that day
- Enter your hourly rate and confirm the overtime threshold (40 is the FLSA standard)
- Review the daily breakdown and gross pay summary on the right
Example Calculations
Example 1: Standard Week with Saturday Overtime
An employee works Monday through Friday, 8:00 AM to 5:00 PM with a 30-minute unpaid lunch each day. Each day yields 8.5 hours minus 0.5 hours break, equaling 8 hours. Five days gives 40 hours total, which falls exactly at the overtime threshold.
If they also work Saturday from 9:00 AM to 1:00 PM (4 hours), the weekly total becomes 44 hours. At $20/hour: Regular pay = 40 x $20 = $800. Overtime pay = 4 x $20 x 1.5 = $120. Gross pay = $920.
Example 2: Night Shift Crossing Midnight
A nurse works Sunday through Thursday, 10:00 PM to 6:30 AM with a 30-minute unpaid break. Each day yields 8.5 hours minus 0.5 hours = 8 hours. The calculator handles the midnight crossover automatically. Five days gives 40 hours. At $28/hour with a night shift differential already included: Regular pay = 40 x $28 = $1,120. If they pick up an extra 6-hour shift on Friday, overtime pay = 6 x $28 x 1.5 = $252. Gross pay = $1,372.
Real-World Scenarios
Hourly Employee Verifying Paycheck
Carlos, a 27-year-old warehouse worker in Atlanta earning $18.50 per hour, wants to verify his paycheck before it arrives. He enters his time card: Monday 7:00 AM to 3:30 PM with 30-minute lunch (7.5 hours), Tuesday through Friday same schedule (30 hours total), plus Saturday 6:00 AM to 11:30 AM with 30-minute lunch (5 hours). Total: 42.5 hours. Regular pay: 40 x $18.50 = $740. Overtime: 2.5 x $18.50 x 1.5 = $69.38. Gross: $809.38. His paycheck shows $809.38, confirming the calculation is correct.
Small Business Payroll for Part-Time Staff
Susan, a 48-year-old cafe owner in Portland, has three part-time employees with different schedules. Barista 1 works 25 hours at $16/hour. Barista 2 works 32 hours at $15/hour. Barista 3 works 38 hours at $17/hour. None exceed 40 hours, so no overtime applies. She runs the calculator three times, once per employee, and gets gross pay figures of $400, $480, and $646. Total payroll for the week: $1,526. She uses these figures to write checks and verify against her POS system's labor cost reports.
Freelancer Tracking Project Profitability
Marcus, a 35-year-old freelance web developer in Chicago, charges a client $4,000 for a website project. He tracks his hours each day: 6 hours on Monday, 5.5 hours on Tuesday, 7 hours on Wednesday, 4.5 hours on Thursday, and 3 hours on Friday. The calculator shows 26 hours total. At his effective rate of $153.85 per hour ($4,000 divided by 26 hours), the project is profitable. But when he compares this to his target rate of $120 per hour, he realizes he is actually earning more than expected and can afford to take on a similar project at the same fee. For converting between hourly and annual salary figures, our Salary Calculator handles the conversion.
Why This Calculation Matters
Payroll errors are one of the most common sources of employee dissatisfaction and labor law violations. Underpaying overtime is a significant legal liability for employers. The Department of Labor's Wage and Hour Division investigates FLSA violations and can require employers to pay back wages plus liquidated damages (double the amount owed). According to the DOL, in fiscal year 2024, the agency recovered $278 million in back wages for over 163,000 workers. Accurate time card calculations protect both workers and businesses from costly mistakes and disputes.
Common Mistakes to Avoid
- Forgetting to enter break time: Paid breaks should not be deducted, but unpaid breaks must be. Verify your company's break policy before entering break minutes. A 30-minute unpaid lunch left undeducted inflates weekly hours by 2.5 hours over a 5-day week, potentially triggering unnecessary overtime
- Using the wrong overtime threshold: The FLSA standard is 40 hours per week. Some states like California require daily overtime for hours over 8 in a single day. Check your local labor laws for the correct threshold. This calculator applies weekly overtime only
- Not accounting for taxes: Gross pay is before taxes and deductions. Your net take-home pay will be lower after federal and state income tax, Social Security (6.2%), Medicare (1.45%), and any voluntary deductions like health insurance or retirement contributions
- Rounding time entries: Many payroll systems round to the nearest quarter hour. The FLSA permits rounding to the nearest 15 minutes as long as it averages out over time. Check whether your employer rounds time before comparing this calculator's result to your paycheck
- Misclassifying exempt vs nonexempt: Employees earning below the FLSA salary threshold of $1,128 per week ($58,656 annually as of 2025) are generally entitled to overtime. Do not assume salaried employees are exempt without verifying the salary and duties tests
Limitations of This Calculator
This calculator applies overtime on a weekly basis only. It does not handle daily overtime rules used in states like California (over 8 hours daily), Alaska (over 10 hours daily), or Nevada (over 8 hours daily when earning less than 1.5x minimum wage). It does not calculate double-time pay for hours over 12 in a day or over 7 consecutive days, which some states require. The calculator uses a single hourly rate and does not handle shift differentials, hazard pay, or blended rates for employees with multiple pay rates. It does not deduct taxes, Social Security, Medicare, or other withholdings. Gross pay is the pre-tax amount. For net pay estimation, use a dedicated take-home pay calculator. The calculator does not handle paid time off, holiday pay, or sick leave hours.
Authoritative Research & Resources
- U.S. Department of Labor: Fair Labor Standards Act - Official DOL reference defining overtime pay requirements (1.5x regular rate for hours over 40 per workweek), hours worked, and recordkeeping obligations for employers
- DOL: Overtime Salary Thresholds - Official earnings thresholds for executive, administrative, and professional exemptions from overtime, including the standard salary level and highly compensated employee requirements
- Paylocity: 2026 Overtime Pay Guide for Employers - Comprehensive employer guide covering the updated FLSA salary threshold of $1,128 per week ($58,656 annually), overtime calculation methods, and compliance best practices