Time Card Calculator

Calculate work hours, lunch breaks, decimal hours, and overtime across your weekly time card.

Total Worked Hours
35h 00m
35.00 decimal hours · Regular: 35h 00m
Overtime Hours1.50x
+0h 00m
0.00 decimal hours · OT Pay: $0.00
Estimated Gross Pay
$875.00
Base: $875.00+$0.00 OT
Overtime Threshold (40h Cap)
5h 00m remaining until overtime
0hCap: 40hLogged: 35h 00m

Rate & Overtime SettingsCustomizable Calculation Parameters

$
hrs

Weekly Work Schedule

Overnight shifts crossing midnight are handled automatically (+24h math).
Monday
7h 00m7.00 decimal hours
Start Time
:
End Time
:
Unpaid Meal Break
Tuesday
7h 00m7.00 decimal hours
Start Time
:
End Time
:
Unpaid Meal Break
Wednesday
7h 00m7.00 decimal hours
Start Time
:
End Time
:
Unpaid Meal Break
Thursday
7h 00m7.00 decimal hours
Start Time
:
End Time
:
Unpaid Meal Break
Friday
7h 00m7.00 decimal hours
Start Time
:
End Time
:
Unpaid Meal Break
Saturday
Day Off
Start Time
:
End Time
:
Unpaid Meal Break
Sunday
Day Off
Start Time
:
End Time
:
Unpaid Meal Break

Weekly Summary

Complete reconciliation of weekly shift hours and estimated gross wages.

Regular Hours
35h 00m
35.00 decimal hours
Overtime Hours
0h 00m
0.00 decimal hours
Total Hours
35h 00m
35.00 decimal hours
Decimal Hours
35.00 hrs
Standard payroll numeric format
Regular Pay
$875.00
Overtime Pay
$0.00
Estimated Gross Pay
$875.00
How to Use This Calculator

Step-by-Step Instructions

  1. 1Enter your start time and end time for each scheduled workday (e.g. 08:30 to 17:00).
  2. 2Select or type your unpaid break duration (e.g. 30, 45, or 60 minutes).
  3. 3For overnight shifts crossing midnight (e.g. 22:00 to 06:00), the calculator automatically applies modular +24h math.
  4. 4Optionally set your hourly wage rate and overtime threshold to estimate weekly gross earnings.
  5. 5Export your finalized card to CSV or print a signed physical timesheet.
Calculation Principle

How Daily Time Card Math Works

Daily worked minutes are computed by subtracting clock-in time from clock-out time, then deducting unpaid meal breaks. Net hours are converted to decimal by dividing total minutes by 60. Overtime is calculated against your weekly threshold (commonly 40 hours).

Mathematical FormulaNet Worked Hours = (Clock Out - Clock In - Unpaid Break Minutes) ÷ 60

Why Accurate Time Card Math Matters

Preventing Payroll Discrepancies and Underpayment

A reliable time card calculator ensures that employees and employers share a transparent, mathematically verified record of hours worked. Because standard clocks use 60 minutes while payroll software requires base-10 decimals, manual calculations frequently create compounding errors.

TimeCardWorks evaluates each shift in exact integer minutes before rounding or converting to decimals, guaranteeing that employees are compensated for every minute worked.

Handling Unpaid Lunch vs Paid Rest Breaks

U.S. Federal Guidance and Meal Period Deductions

Under U.S. federal guidance, short rest breaks are generally treated differently from bona fide meal periods. State and local rules may impose additional requirements.

Bona fide meal breaks lasting 30 minutes or longer—where the worker is completely relieved of all duties—are typically unpaid and deducted from elapsed shift time under federal principles, whereas short rest breaks (5 to 20 minutes) are generally compensable working time.

Practical Worked Example
Standard 5-Day Workweek with 30-Minute Lunches

Working Monday through Friday from 08:30 to 17:00 with a daily 30-minute unpaid lunch break.

Calculation Steps
  • •Gross elapsed time per day: 08:30 to 17:00 = 8 hours 30 minutes (510 minutes).
  • •Deduct 30-minute unpaid lunch: 510m - 30m = 480 working minutes (8.00 hours net per day).
  • •Weekly tally: 5 days × 8.00 hours = 40.00 total regular hours.
  • •At an hourly rate of $25.00/hr: 40.00 × $25.00 = $1,000.00 gross earnings.
Final Calculated ResultTotal: 40h 00m (40.00 decimal hours). Gross Pay: $1,000.00.
Common Pitfalls to Avoid

Frequent Calculation Mistakes

  • ✕Entering 15 minutes as 0.15 instead of 0.25 decimal hours.
  • ✕Subtracting paid 10-to-15 minute rest breaks that should remain compensable.
  • ✕Failing to account for shifts crossing midnight, resulting in negative time subtraction.
Frequently Asked Questions

Questions & Answers

Are lunch breaks required to be deducted from time cards?

Under U.S. federal guidance, bona fide meal periods (typically 30 minutes or longer where the worker is completely relieved of duty) are usually unpaid, while short rest breaks (5 to 20 minutes) are generally compensable. State laws, collective agreements, and employment policies may differ.

How do decimal hours differ from clock hours and minutes?

Clock time uses base 60 (60 minutes per hour), whereas payroll multiplication requires decimal base 10. For instance, 7 hours and 30 minutes equals 7.50 decimal hours, not 7.30.

Is my timesheet data stored on any external server?

No. All calculations run entirely inside your browser via client-side JavaScript. Your hours and wage figures are not transmitted or stored remotely.

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Private by Architecture: Your timesheet and wage inputs are processed locally in your browser and are not stored on our servers.

Work Hours, Overtime & Shift Math Knowledge Base

Step-by-step mathematical guides covering decimal hours conversion, overnight cross-midnight calculations, and break deduction arithmetic.