Enter your clock-in, clock-out, and break times to calculate total hours and gross pay.
Total Time Worked:0h 0m
Decimal Hours:0.00 hrs
Total Gross Pay:$0.00
How to Use the Time Card Calculator
Managing payroll and tracking employee hours is a critical task for any business. This Time Card Calculator simplifies the process of converting "clock-in" and "clock-out" times into decimal hours used for payroll processing. Whether you are an employee tracking your overtime or a business owner calculating weekly wages, this tool ensures accuracy and eliminates manual math errors.
Understanding Time Card Math
Calculating work hours isn't as simple as subtracting one number from another because time operates on a base-60 system (minutes) while payroll systems operate on a decimal system (base-100). To calculate your pay, you must first convert your total minutes into a decimal format.
The Formula:
Calculate total elapsed minutes: (End Time - Start Time)
Subtract unpaid break time in minutes.
Divide total minutes by 60 to get decimal hours.
Multiply decimal hours by hourly wage.
Example Calculation
Suppose you clock in at 8:30 AM and clock out at 5:15 PM with a 45-minute lunch break. Your hourly rate is $20.00.
Total duration from 8:30 AM to 5:15 PM is 8 hours and 45 minutes (525 total minutes).
Subtract the 45-minute break: 525 – 45 = 480 minutes.
Convert to decimal: 480 / 60 = 8.00 hours.
Calculate pay: 8.00 x $20.00 = $160.00.
Why Use a Digital Time Tracker?
Manual time tracking is prone to "time theft" or simple human error, which can cost businesses thousands of dollars annually. Using a standardized calculator helps in:
FLSA Compliance: Ensuring employees are paid for all hours worked, including overtime.
Accuracy: Avoiding rounding errors that occur when manually calculating minutes.
Transparency: Providing clear records for both employer and employee.
Common Time Conversion Chart
Minutes
Decimal Equivalent
15 Minutes
0.25 Hours
30 Minutes
0.50 Hours
45 Minutes
0.75 Hours
function calculateTimeCard() {
var startInput = document.getElementById('startTime').value;
var endInput = document.getElementById('endTime').value;
var breakMins = parseFloat(document.getElementById('breakMinutes').value);
var hourlyRate = parseFloat(document.getElementById('hourlyRate').value);
if (!startInput || !endInput) {
alert('Please enter both start and end times.');
return;
}
if (isNaN(breakMins)) breakMins = 0;
if (isNaN(hourlyRate)) hourlyRate = 0;
// Parse hours and minutes
var startParts = startInput.split(':');
var endParts = endInput.split(':');
var startTotalMinutes = (parseInt(startParts[0]) * 60) + parseInt(startParts[1]);
var endTotalMinutes = (parseInt(endParts[0]) * 60) + parseInt(endParts[1]);
// Handle overnight shifts (if end time is before start time)
if (endTotalMinutes < startTotalMinutes) {
endTotalMinutes += 1440; // Add 24 hours in minutes
}
var netMinutes = endTotalMinutes – startTotalMinutes – breakMins;
if (netMinutes < 0) {
alert('Break time cannot be longer than total work time.');
return;
}
var finalHours = Math.floor(netMinutes / 60);
var finalMins = netMinutes % 60;
var decimalHours = netMinutes / 60;
var totalPay = decimalHours * hourlyRate;
// Display Results
document.getElementById('tcResult').style.display = 'block';
document.getElementById('displayHours').innerText = finalHours + 'h ' + finalMins + 'm';
document.getElementById('displayDecimal').innerText = decimalHours.toFixed(2) + ' hrs';
document.getElementById('displayPay').innerText = '$' + totalPay.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
}