Federal 40-Hour Overtime Estimate • Free & No Sign-up

Free Time Card Calculator

Calculate daily work hours, deduct unpaid lunch breaks, and estimate gross weekly earnings with exact integer-minute precision and overtime calculations.

Weekly Timesheet·Unrounded Minute Precision

Weekly Work Hours Calculator

$
hours/wk
Work DayClock InClock OutUnpaid BreakDaily Paid Time
Monday
min
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Tuesday
min
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Wednesday
min
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Thursday
min
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Friday
min
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Saturday
min
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Sunday
min
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Total Worked Time

0.00decimal hrs

= 0h 0m

Regular Straight Time

0.00hrs

$0.00 @ $20.00/hr

Overtime Hours (1.5×)

0.00hrs

$0.00 @ $30.00/hr

Estimated Gross Earnings(Before deductions)
$0.00

Based on FLSA 40h threshold & unrounded minute math

FLSA Federal Rule: Under 29 U.S.C. § 207, overtime applies to actual hours worked over 40 in a designated 7-day workweek. Overtime hours cannot be averaged over two weeks even if your employer issues biweekly paychecks.

Integer-Minute Precision

Unlike basic tools that prematurely round minutes to two decimals, our engine computes base pay and overtime from exact elapsed minutes to prevent payroll discrepancies.

Client-Side Processing

Calculations run client-side in your browser, with optional browser-local storage for your convenience. No timesheet records or pay rates are transmitted to external servers or sold.

FLSA Overtime Rules

Modeled directly on standard federal 40-hour weekly workweek rules under the Fair Labor Standards Act with customizable hourly rate and weekly overtime threshold.

Calculation Methodology

Calculate Your Work Hours and Estimated Pay

Calculating time card hours accurately involves three primary mathematical steps: converting shift clock times into elapsed integer minutes, subtracting non-compensable meal breaks, and dividing weekly hours between regular straight-time and overtime thresholds.

1

Elapsed Shift Minutes

Determine total elapsed minutes from clock-in to clock-out. A shift from 9:00 AM to 5:00 PM represents 480 elapsed minutes (8.0 hours).

2

Subtract Unpaid Meal Breaks

Deduct bona fide unpaid meal periods (e.g. 30 or 60 minutes). 480 minutes minus a 30-minute unpaid lunch leaves 450 paid minutes (7 hours 30 minutes, or 7.50 decimal hours).

3

Apply Weekly Overtime

Sum all daily paid hours in the fixed 7-day workweek. Hours up to the weekly threshold (standard 40.0) earn base wages ($20/hr). Hours exceeding the threshold earn 1.5× time-and-a-half ($30/hr).

How to Use Our Time Card Calculator

Whether you are an hourly worker verifying an upcoming paycheck or a supervisor tabulating weekly hours, follow these steps:

1. Select Your Workweek Starting Day

Align the calculator with your employer's established 7-day workweek (Monday or Sunday). Under federal law, overtime resets at the conclusion of each fixed workweek.

2. Enter Clock-In and Clock-Out Times

Input your shift start and end times. Shifts crossing midnight (such as 10:00 PM to 6:00 AM) are automatically recognized as overnight shifts. Note on workweek boundaries: An overnight shift on the final day of the week is attributed to that starting day. Under FLSA 29 CFR § 778.105, if your employer splits hours at the midnight workweek cutoff, log post-midnight hours on Day 1 of your next timesheet.

3. Enter Unpaid Meal Breaks in Minutes

Enter your unpaid meal break in minutes (e.g. 30 or 60). Short coffee or rest breaks (5 to 20 minutes) should not be deducted because they are legally compensable hours worked.

4. Review Overtime and Estimated Gross Pay

Set your hourly wage rate to preview straight-time wages, overtime wages (1.5×), and estimated gross earnings before taxes and voluntary deductions.

5. Print or Export to CSV

Use Print for an ink-optimized timesheet with employee and supervisor signature lines, or CSV to export rows for spreadsheet analysis.

Understanding Regular Hours and Overtime Under Federal Law

The federal Fair Labor Standards Act (FLSA) establishes basic minimum wage and overtime standards for covered, nonexempt employees in the United States.

Unless an employee falls into an exempt classification (such as bona fide executive, administrative, professional, or outside sales roles under 29 CFR Part 541), covered nonexempt workers must receive overtime pay for hours worked over 40 in a designated workweek at a rate not less than time and one-half (1.5×) their regular rate of pay.

Example Calculation

Assuming a nonexempt employee works 45 hours in a single workweek at a base rate of $20.00/hour:

• Regular Straight Time: 40 hrs × $20.00 = $800.00

• Overtime Pay: 5 hrs × ($20.00 × 1.5 = $30.00) = $150.00

• Estimated Gross Earnings: $800.00 + $150.00 = $950.00

*Disclaimer: Certain states (such as California, Nevada, and Alaska) enforce daily overtime thresholds (e.g. over 8 hours in a workday). In addition, nondiscretionary bonuses, shift differentials, and commissions can affect the FLSA regular rate of pay. TimeCard Web applies the standard federal 40-hour weekly baseline.

Federal Workweek Principles

  • •No Biweekly Averaging: The FLSA strictly prohibits averaging hours across two or more workweeks. If an employee works 45 hours in Week 1 and 35 hours in Week 2, 5 hours of overtime must be paid for Week 1 even though the combined total is 80 hours.
  • •Fixed 168-Hour Workweek: A workweek is a fixed and regularly recurring period of 168 hours (seven consecutive 24-hour periods). It may begin on any day and hour designated by the employer.
  • •Weekends and Night Shifts: Federal law does not mandate extra overtime pay merely for working Saturdays, Sundays, holidays, or night shifts unless those hours cause total weekly hours to exceed 40.

How to Subtract Lunch Breaks (Official FLSA Rules)

Bona Fide Meal Periods (29 CFR § 785.19)

Under federal regulations, bona fide meal periods are not work time and do not require compensation when:

  • The employee is completely relieved from duty for the purpose of eating regular meals.
  • The break ordinarily lasts at least 30 minutes uninterrupted (shorter periods may qualify under special conditions).
  • Important Legal Clarification: Under 29 CFR § 785.19(b), it is not required that an employee be permitted to leave the employer's premises, provided they are otherwise completely freed from all duties during the meal period.

Action in Tool: Enter your unpaid meal duration (e.g. 30 or 60) in the "Unpaid Break" column.

Compensable Rest Periods (29 CFR § 785.18)

Under federal regulation 29 CFR § 785.18, rest periods of short duration must be counted as compensable hours worked:

  • Rest pauses running from 5 to about 20 minutes are common in industry to promote employee efficiency.
  • Coffee breaks, water breaks, and brief personal pauses are compensable hours worked.
  • Federal law prohibits employers from deducting these short rest pauses from compensable work hours.

Action in Tool: Do NOT deduct short 5-to-20 minute rest pauses from your time card.

Weekly vs. Biweekly Time Cards: Overtime Rules

Many U.S. employers issue payroll biweekly (every two weeks). A common misunderstanding occurs when an employee works 80 hours total across two weeks, but overtime pay is improperly omitted:

The Impermissible "80-Hour Averaging" Approach

Suppose a worker logs 45 hours in Week 1 and 35 hours in Week 2. Total hours equal 80. If an employer treats this as 80 straight-time hours at $20/hr, they pay $1,600.00 and omit 5 hours of overtime.

Improperly Calculated Pay: 80 hrs × $20.00 = $1,600.00 ($50 short)

The Lawful Independent Workweek Model

Under federal law, each 7-day workweek stands alone. Week 1 yields 40 regular hours ($800) + 5 overtime hours ($150) = $950. Week 2 yields 35 regular hours = $700.

Lawful Gross Pay: $950 + $700 = $1,650.00

Official U.S. Department of Labor Citations

The calculation formulas and explanations on TimeCard Web reference public guidance published by the U.S. Department of Labor Wage and Hour Division (WHD):

In-Depth Educational Guides

Learn the Mathematics Behind Work Hours & Pay

Master military time conversions, 29 CFR § 785.19 meal deduction standards, overnight modulo math, and paycheck discrepancy audits.

View All Guides
Calculator Ecosystem

Specialized Calculators & Wage Verification Tools

In addition to the primary 7-day timecard calculator above, use these specialized standalone calculators designed for specific shift patterns, meal break rules, and payroll audits. All tools share the same verified mathematical engine.

Knowledge Base

Frequently Asked Questions

Clear answers to common questions about work hour calculations, federal overtime thresholds, lunch break deductions, and payroll decimals.

How is weekly overtime calculated under the Fair Labor Standards Act (FLSA)?
Under the federal FLSA, covered nonexempt employees must receive overtime pay for all hours worked over 40 in a designated 7-day workweek. The minimum overtime rate is one and one-half times (1.5×) the employee’s regular rate of pay. Overtime is assessed strictly on an individual workweek basis; hours cannot be averaged over two weeks even if paychecks are issued biweekly.
Are lunch breaks paid or unpaid by law?
Under federal regulation 29 CFR § 785.19, bona fide meal periods (typically lasting 30 minutes or longer) during which an employee is completely relieved from work duties are not work hours and do not require pay. However, short rest periods lasting between 5 and 20 minutes (under 29 CFR § 785.18) must be counted as compensable hours worked and cannot be deducted.
How do you calculate hours worked for an overnight shift crossing midnight?
To calculate an overnight shift (for example, starting Monday at 10:00 PM and finishing Tuesday at 6:00 AM), determine the minutes worked before midnight (10:00 PM to 12:00 AM = 120 minutes = 2 hours) and add the minutes worked after midnight (12:00 AM to 6:00 AM = 360 minutes = 6 hours). This equals an 8-hour total span (480 minutes). Subtracting a 30-minute unpaid lunch leaves 7.50 paid decimal hours (7 hours and 30 minutes).
How do I convert hours and minutes to decimal hours for payroll?
To convert minutes into payroll decimal hours, divide the minutes by 60. For example: 15 minutes is 0.25 hours (15 ÷ 60), 30 minutes is 0.50 hours (30 ÷ 60), and 45 minutes is 0.75 hours (45 ÷ 60). Therefore, a shift of 7 hours and 45 minutes equals 7.75 decimal hours.
Do I need an account or sign-up to use TimeCard Web?
No. All calculators, decimal conversion tools, timesheet print receipts, and CSV export functions on TimeCard Web are 100% free with no account or registration required. Calculations are performed locally in your browser to safeguard your privacy.
Why does my biweekly paycheck show less overtime than I expected?
A frequent cause of missing overtime on biweekly paychecks is improper averaging. If you worked 45 hours in Week 1 and 35 hours in Week 2, you worked 80 total hours. If your employer treats 80 hours as straight time, they have unlawfully failed to pay 5 hours of overtime for Week 1. Use our Paycheck Hours Checker to audit discrepancies.
Is TimeCard Web calculation considered official legal or tax advice?
No. TimeCard Web provides mathematical estimates based on federal FLSA rules for informational and verification purposes. Some states (like California) enforce daily overtime rules, and complex compensation (commissions, bonuses, shift differentials) may adjust your regular rate. Always consult a qualified labor attorney or payroll professional for legal determinations.

Trust, Privacy & Legal Information

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