Time Clock Calculator

by
time clock calculator
Daily Hours with BreakWeekly Total (Decimal Only)
AMPM
AMPM
AMPM
AMPM
Results:
Total Time: 0h 0m
Decimal Hours: 0.00
Gross Pay: $0.00
function getMins(h,m,ap){h=parseInt(h)||0;m=parseInt(m)||0;if(ap==="PM"&&h<12)h+=12;if(ap==="AM"&&h===12)h=0;return(h*60)+m;}function calculateTime(){var h1=document.getElementById('h1').value,m1=document.getElementById('m1').value,ap1=document.getElementById('ap1').value;var h2=document.getElementById('h2').value,m2=document.getElementById('m2').value,ap2=document.getElementById('ap2').value;var h3=document.getElementById('h3').value,m3=document.getElementById('m3').value,ap3=document.getElementById('ap3').value;var h4=document.getElementById('h4').value,m4=document.getElementById('m4').value,ap4=document.getElementById('ap4').value;var rate=parseFloat(document.getElementById('rate').value)||0;if(!h1||!h4){alert('Please enter Shift Start and Shift End times.');return;}var t1=getMins(h1,m1,ap1);var t2=getMins(h2,m2,ap2);var t3=getMins(h3,m3,ap3);var t4=getMins(h4,m4,ap4);if(t4<t1)t4+=1440;var totalMins=(t4-t1);if(h2&&h3){var breakMins=(t3-t2);if(breakMins<0)breakMins+=1440;totalMins-=breakMins;}if(document.getElementById('rounding').checked){var hours=Math.floor(totalMins/60);var rem=totalMins%60;var quarter=Math.round(rem/15)*15;totalMins=(hours*60)+quarter;}var finalHours=Math.floor(totalMins/60);var finalMins=totalMins%60;var decimalHours=totalMins/60;document.getElementById('timeStr').innerHTML=finalHours+"h "+finalMins+"m";document.getElementById('timeDec').innerHTML=decimalHours.toFixed(2);document.getElementById('totalPay').innerHTML="$"+(decimalHours*rate).toFixed(2);}

Calculator Use

This time clock calculator is a professional tool designed for employees, freelancers, and small business owners to accurately track work hours and calculate payroll. Unlike basic timers, this calculator allows you to input specific "clock-in" and "clock-out" times, automatically subtracts lunch breaks, and converts the final duration into decimal format for easy billing.

By entering your hourly wage, you can instantly see your gross earnings before taxes. This tool is especially helpful for resolving discrepancies between personal logs and official company pay stubs.

Shift Start and End
The exact time you arrived at work and the time you finished your daily duties.
Break Duration
Enter the start and end of your unpaid lunch or rest break. The calculator automatically subtracts this time from your total.
7-Minute Rounding Rule
An optional feature based on FLSA guidelines where minutes are rounded to the nearest 15-minute increment (0, 15, 30, 45).

How It Works

The time clock calculator performs calculations by converting standard time (HH:MM AM/PM) into minutes since the start of the day. The core formula used is:

Total Work Time = (End Time – Start Time) – (Break End – Break Start)

  • Decimal Conversion: Payroll systems usually require hours in decimals. We divide the total minutes by 60 to get this figure (e.g., 8 hours 30 minutes = 8.50 hours).
  • Midnight Crossing: If the end time is numerically lower than the start time (e.g., Start 10 PM, End 6 AM), the system adds 24 hours to the end time to ensure a correct positive duration.
  • Gross Pay: This is calculated by multiplying the decimal hours by the hourly rate provided.

Calculation Example

Example: A graphic designer starts their shift at 8:45 AM and finishes at 5:15 PM. They took a lunch break from 12:30 PM to 1:15 PM. Their rate is $25.00/hour.

Step-by-step solution:

  1. Gross Shift Duration: 8:45 AM to 5:15 PM is 8 hours and 30 minutes (510 minutes).
  2. Break Duration: 12:30 PM to 1:15 PM is 45 minutes.
  3. Net Work Time: 510 minutes – 45 minutes = 465 minutes.
  4. Convert to Decimals: 465 / 60 = 7.75 hours.
  5. Calculate Pay: 7.75 × $25.00 = $193.75.
  6. Final Result: 7 hours 45 mins (7.75 decimal hours) with $193.75 gross pay.

Common Questions

What is the 7-minute rounding rule?

Under the Fair Labor Standards Act (FLSA), employers are permitted to round employee time to the nearest quarter-hour. If an employee clocks in within 7 minutes of the interval, the time is rounded down; if they clock in 8 or more minutes into the interval, it is rounded up. This time clock calculator includes a toggle to see how this affects your pay.

How do I convert minutes to decimal hours?

To convert minutes to a decimal, divide the number of minutes by 60. For example, 15 minutes is 0.25 (15/60), 30 minutes is 0.50 (30/60), and 45 minutes is 0.75 (45/60). Using a time clock calculator automates this to prevent rounding errors in payroll.

Does this calculator handle overtime?

This version calculates total daily hours. To determine weekly overtime, calculate each day separately and sum the decimal hours. Any total over 40 hours in a standard workweek is typically considered overtime in the United States, usually paid at 1.5 times the regular hourly rate.

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