Weekly Time Clock Calculator
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color: #333;
line-height: 1.6;
margin: 0;
padding: 20px;
display: flex;
flex-direction: column;
align-items: center;
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padding: 30px;
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.input-group {
margin-bottom: 20px;
text-align: left;
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.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 500;
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.input-group input[type="time"],
.input-group input[type="number"] {
width: calc(100% – 22px); /* Account for padding and border */
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
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button:hover {
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#result {
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text-align: center;
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#result h3 {
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#totalHours {
font-size: 2rem;
font-weight: bold;
color: #28a745;
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Weekly Time Clock Calculator
Calculate Total Hours
Total Weekly Worked Hours:
00.00
Understanding the Weekly Time Clock Calculator
The Weekly Time Clock Calculator is a straightforward tool designed to help individuals and businesses accurately track and sum up the total hours worked over a seven-day period. This is crucial for payroll, project management, and ensuring fair compensation for employees. Unlike financial calculators that deal with money, this tool focuses purely on the measurement of time.
How it Works: The Math Behind the Calculation
The core of this calculator involves converting time entries (start and end times) into a quantifiable measure of hours and minutes, and then summing these up for the week. Here's a breakdown of the process:
Time Conversion: Each day's start and end times are converted into a consistent unit, usually minutes or a decimal representation of hours. For example, 09:00 AM is 9 hours, and 05:00 PM is 17 hours in a 24-hour format. The difference between the end time and start time gives the gross duration worked.
Break Subtraction: Any unpaid break times entered (in minutes) are subtracted from the gross duration for that day. It's important that break times are entered consistently, typically as minutes.
Daily Total Calculation: The net duration for each day is calculated as: (End Time – Start Time) – Break Time. This result is often expressed in hours (e.g., 7.5 hours).
Weekly Summation: The net hours for each day (Monday through Sunday) are added together to produce the final total weekly worked hours.
Example Calculation:
Let's consider a sample work week:
Monday: Start 08:30, End 17:00, Break 45 mins.Tuesday: Start 09:00, End 17:30, Break 30 mins.Wednesday: Start 08:00, End 16:00, Break 60 mins.Thursday: Start 09:15, End 17:45, Break 30 mins.Friday: Start 08:45, End 16:45, Break 45 mins.Saturday: No workSunday: No work
Calculations:
Monday: (17:00 – 08:30) = 8 hours 30 mins. 8.5 hours – (45/60) hours = 8.5 – 0.75 = 7.75 hours.Tuesday: (17:30 – 09:00) = 8 hours 30 mins. 8.5 hours – (30/60) hours = 8.5 – 0.50 = 8.00 hours.Wednesday: (16:00 – 08:00) = 8 hours. 8.0 hours – (60/60) hours = 8.0 – 1.00 = 7.00 hours.Thursday: (17:45 – 09:15) = 8 hours 30 mins. 8.5 hours – (30/60) hours = 8.5 – 0.50 = 8.00 hours.Friday: (16:45 – 08:45) = 8 hours. 8.0 hours – (45/60) hours = 8.0 – 0.75 = 7.25 hours.Saturday & Sunday: 0 hours each.
Total Weekly Hours: 7.75 + 8.00 + 7.00 + 8.00 + 7.25 = 38.00 hours .
Use Cases:
Employees: Tracking work hours for payroll accuracy, especially for hourly workers.Freelancers: Monitoring time spent on different projects for client billing.Small Businesses: Managing employee schedules and ensuring accurate wage calculations.Shift Workers: Calculating hours across various shift patterns, including overnight or rotating schedules.
This calculator simplifies the often tedious task of manual time tracking, providing a clear and reliable summary of weekly work hours.
function parseTime(timeString) {
if (!timeString) return 0;
var parts = timeString.split(':');
return parseInt(parts[0]) * 60 + parseInt(parts[1]);
}
function formatHours(totalMinutes) {
var hours = Math.floor(totalMinutes / 60);
var minutes = Math.round(totalMinutes % 60); // Round to nearest minute
return String(hours).padStart(2, '0') + '.' + String(minutes).padStart(2, '0');
}
function calculateDailyHours(startId, endId, breakId) {
var startTimeStr = document.getElementById(startId).value;
var endTimeStr = document.getElementById(endId).value;
var breakMinutes = parseInt(document.getElementById(breakId).value) || 0;
if (!startTimeStr || !endTimeStr) {
return 0;
}
var startMinutes = parseTime(startTimeStr);
var endMinutes = parseTime(endTimeStr);
var totalMinutes = 0;
if (endMinutes >= startMinutes) {
totalMinutes = endMinutes – startMinutes;
} else {
// Handle overnight shifts (e.g., start 22:00, end 06:00)
totalMinutes = (24 * 60 – startMinutes) + endMinutes;
}
// Subtract break time, ensuring it doesn't result in negative hours
var netMinutes = Math.max(0, totalMinutes – breakMinutes);
return netMinutes;
}
function calculateWeeklyHours() {
var totalWeeklyMinutes = 0;
totalWeeklyMinutes += calculateDailyHours('mondayStart', 'mondayEnd', 'mondayBreak');
totalWeeklyMinutes += calculateDailyHours('tuesdayStart', 'tuesdayEnd', 'tuesdayBreak');
totalWeeklyMinutes += calculateDailyHours('wednesdayStart', 'wednesdayEnd', 'wednesdayBreak');
totalWeeklyMinutes += calculateDailyHours('thursdayStart', 'thursdayEnd', 'thursdayBreak');
totalWeeklyMinutes += calculateDailyHours('fridayStart', 'fridayEnd', 'fridayBreak');
totalWeeklyMinutes += calculateDailyHours('saturdayStart', 'saturdayEnd', 'saturdayBreak');
totalWeeklyMinutes += calculateDailyHours('sundayStart', 'sundayEnd', 'sundayBreak');
var totalHoursFormatted = formatHours(totalWeeklyMinutes);
document.getElementById('totalHours').textContent = totalHoursFormatted;
}
// Initial calculation on page load if values are present
window.onload = function() {
calculateWeeklyHours();
};