Work Time Calculator

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Work Time Calculator
Daily Work Hours & Pay
Results:
Please enter times to calculate work hours.
function calculateWorkTime(){var start=document.getElementById('start_time').value;var end=document.getElementById('end_time').value;var breakMins=parseFloat(document.getElementById('break_mins').value)||0;var rate=parseFloat(document.getElementById('hourly_rate').value)||0;var showSteps=document.getElementById('steps').checked;if(!start||!end){alert('Please enter both start and end times');return;}var sParts=start.split(':');var eParts=end.split(':');var sMin=parseInt(sParts[0])*60+parseInt(sParts[1]);var eMin=parseInt(eParts[0])*60+parseInt(eParts[1]);if(eMin<sMin){eMin+=1440;}var totalMin=eMin-sMin;var netMin=totalMin-breakMins;if(netMin<0)netMin=0;var hours=Math.floor(netMin/60);var mins=netMin%60;var decimalHours=netMin/60;var totalPay=decimalHours*rate;var output='
';output+='Total Time Worked: '+hours+' hours and '+mins+' minutes
';output+='Decimal Hours: '+decimalHours.toFixed(2)+' hours
';output+='Gross Pay: $'+totalPay.toLocaleString(undefined,{minimumFractionDigits:2,maximumFractionDigits:2});if(showSteps){output+='
';output+='Steps:
';output+='1. Convert Start Time to minutes: '+sMin+' min
';output+='2. Convert End Time to minutes: '+eMin+' min
';output+='3. Difference: '+totalMin+' min
';output+='4. Subtract break ('+breakMins+' min): '+netMin+' min
';output+='5. Convert to decimal: '+netMin+' / 60 = '+decimalHours.toFixed(4)+' hours';}output+='
';document.getElementById('resultText').innerHTML=output;}

Using the Work Time Calculator

Managing your schedule effectively requires precise tracking. This work time calculator is designed to help employees, freelancers, and managers quickly determine exact hours worked in a day. By entering your start and end times along with any unpaid breaks, you can calculate total work hours and expected gross pay instantly.

Whether you are filling out a timesheet or verifying your paycheck, this tool eliminates the confusion of converting minutes to decimals and handles shifts that cross over midnight.

Start & End Time
The exact time you clocked in and clocked out. The calculator supports a 24-hour format and automatically handles overnight shifts.
Break Duration
The total amount of time (in minutes) spent on unpaid breaks, such as lunch. This is subtracted from the total elapsed time.
Hourly Rate
Your gross hourly pay. Entering this allows the tool to calculate your earnings based on the decimal hour result.

How to Calculate Work Hours Manually

The fundamental math behind a work time calculator involves calculating the elapsed time and converting the remainder into a decimal format. This is necessary because payroll systems calculate pay using decimals (e.g., 8.5 hours) rather than hours and minutes (8 hours and 30 minutes).

Net Work Hours = [(End Time – Start Time) – Break Time] / 60

  • Step 1: Convert all times to "minutes from midnight" (Hours × 60 + Minutes).
  • Step 2: Subtract the start time from the end time to get total elapsed minutes.
  • Step 3: Subtract the total break minutes.
  • Step 4: Divide the final minute count by 60 to get decimal hours.

Calculation Example

Example: An employee starts work at 8:30 AM and leaves at 5:15 PM (17:15), taking a 45-minute unpaid lunch break. Their hourly rate is $22.00.

Step-by-step solution:

  1. Start Time (08:30) = (8 × 60) + 30 = 510 minutes
  2. End Time (17:15) = (17 × 60) + 15 = 1,035 minutes
  3. Elapsed Time = 1,035 – 510 = 525 minutes
  4. Subtract Break = 525 – 45 = 480 minutes
  5. Decimal Hours = 480 / 60 = 8.00 hours
  6. Total Pay = 8.00 × $22.00 = $176.00

Frequently Asked Questions

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 hours (15/60), 30 minutes is 0.5 hours (30/60), and 45 minutes is 0.75 hours (45/60).

Does this calculator handle night shifts?

Yes. This work time calculator automatically detects if the end time is numerically lower than the start time (e.g., starting at 10:00 PM and ending at 6:00 AM) and adds 24 hours to the calculation to ensure accuracy for overnight work.

Is the break time usually paid or unpaid?

In most jurisdictions, short breaks (5-20 minutes) are paid, while longer meal periods (30+ minutes) are unpaid. You should only enter the time for unpaid breaks in the calculator to ensure your total hours and pay reflect your actual earnings.

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