.time-card-calculator-container {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
max-width: 700px;
margin: 30px auto;
padding: 25px;
background-color: #ffffff;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
color: #333;
}
.time-card-calculator-container h2 {
color: #004a99;
text-align: center;
margin-bottom: 20px;
font-size: 2.2em;
border-bottom: 2px solid #004a99;
padding-bottom: 10px;
}
.input-group {
margin-bottom: 18px;
display: flex;
flex-wrap: wrap;
align-items: center;
gap: 10px;
}
.input-group label {
flex: 1 1 150px; /* Flex basis for labels */
min-width: 120px; /* Minimum width for labels */
font-weight: 600;
color: #004a99;
font-size: 1.1em;
}
.input-group input[type="time"],
.input-group input[type="date"] {
flex: 1 1 200px; /* Flex basis for inputs */
padding: 10px 15px;
border: 1px solid #ccc;
border-radius: 5px;
font-size: 1em;
color: #555;
background-color: #f8f9fa;
transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.input-group input[type="time"]:focus,
.input-group input[type="date"]:focus {
border-color: #004a99;
box-shadow: 0 0 0 0.2rem rgba(0, 74, 153, 0.25);
outline: none;
}
.calculator-buttons {
text-align: center;
margin-top: 25px;
margin-bottom: 30px;
}
.calculator-buttons button {
background-color: #004a99;
color: white;
border: none;
padding: 12px 25px;
border-radius: 5px;
font-size: 1.1em;
cursor: pointer;
transition: background-color 0.3s ease, transform 0.2s ease;
margin: 5px;
}
.calculator-buttons button:hover {
background-color: #003366;
transform: translateY(-2px);
}
.calculator-buttons button:active {
transform: translateY(0);
}
.calculator-buttons button.clear-button {
background-color: #6c757d;
}
.calculator-buttons button.clear-button:hover {
background-color: #5a6268;
}
#calculationResult {
background-color: #e9ecef;
border: 1px solid #dee2e6;
border-radius: 5px;
padding: 20px;
margin-top: 20px;
text-align: center;
}
#calculationResult h3 {
color: #004a99;
margin-bottom: 15px;
font-size: 1.5em;
}
#calculationResult p {
font-size: 1.2em;
font-weight: bold;
color: #28a745;
margin-top: 5px;
}
.article-content {
margin-top: 40px;
border-top: 1px solid #eee;
padding-top: 25px;
}
.article-content h3 {
color: #004a99;
margin-bottom: 15px;
font-size: 1.8em;
}
.article-content p,
.article-content ul {
line-height: 1.7;
font-size: 1.1em;
color: #555;
}
.article-content ul {
margin-left: 20px;
margin-bottom: 15px;
}
.article-content ul li {
margin-bottom: 8px;
}
.article-content strong {
color: #004a99;
}
/* Responsive adjustments */
@media (max-width: 600px) {
.input-group {
flex-direction: column;
align-items: stretch;
}
.input-group label {
flex-basis: auto;
width: 100%;
text-align: left;
margin-bottom: 5px;
}
.input-group input[type="time"],
.input-group input[type="date"] {
flex-basis: auto;
width: 100%;
}
.time-card-calculator-container {
padding: 15px;
}
.calculator-buttons button {
width: calc(50% – 10px); /* Two buttons per row */
margin-bottom: 10px;
}
}
function calculateWorkHours() {
var startTimeInput = document.getElementById("startTime").value;
var endTimeInput = document.getElementById("endTime").value;
var breakDurationInput = document.getElementById("breakDuration").value;
var startDateInput = document.getElementById("startDate").value;
var resultDiv = document.getElementById("calculationResult");
var totalHoursWorkedDisplay = document.getElementById("totalHoursWorked");
var formattedHoursWorkedDisplay = document.getElementById("formattedHoursWorked");
// Clear previous results
totalHoursWorkedDisplay.textContent = "–";
formattedHoursWorkedDisplay.textContent = "–";
resultDiv.style.backgroundColor = "#e9ecef";
formattedHoursWorkedDisplay.style.color = "#28a745"; // Reset to default success color
if (!startTimeInput || !endTimeInput || !breakDurationInput || !startDateInput) {
formattedHoursWorkedDisplay.textContent = "Please fill in all fields.";
formattedHoursWorkedDisplay.style.color = "#dc3545"; // Error color
return;
}
// Parse times
var startParts = startTimeInput.split(':');
var endParts = endTimeInput.split(':');
var startHours = parseInt(startParts[0], 10);
var startMinutes = parseInt(startParts[1], 10);
var endHours = parseInt(endParts[0], 10);
var endMinutes = parseInt(endParts[1], 10);
// Convert to total minutes from midnight
var startTotalMinutes = startHours * 60 + startMinutes;
var endTotalMinutes = endHours * 60 + endMinutes;
// Handle cases where end time is on the next day (e.g., overnight shifts)
if (endTotalMinutes < startTotalMinutes) {
endTotalMinutes += 24 * 60; // Add a full day in minutes
}
var totalShiftMinutes = endTotalMinutes – startTotalMinutes;
// Parse break duration and ensure it's a valid number
var breakMinutes = parseInt(breakDurationInput, 10);
if (isNaN(breakMinutes) || breakMinutes < 0) {
formattedHoursWorkedDisplay.textContent = "Invalid break duration. Please enter a non-negative number.";
formattedHoursWorkedDisplay.style.color = "#dc3545";
return;
}
// Calculate net work hours
var netWorkMinutes = totalShiftMinutes – breakMinutes;
// Ensure net work hours are not negative
if (netWorkMinutes < 0) {
formattedHoursWorkedDisplay.textContent = "Error: Break duration exceeds shift duration.";
formattedHoursWorkedDisplay.style.color = "#dc3545";
return;
}
// Convert net work minutes to hours and minutes for display
var netHours = Math.floor(netWorkMinutes / 60);
var remainingMinutes = netWorkMinutes % 60;
// Format the result
var formattedHours = netHours + " hours " + remainingMinutes + " minutes";
var decimalHours = (netWorkMinutes / 60).toFixed(2); // e.g., 7.50
totalHoursWorkedDisplay.textContent = "Total Shift Duration: " + Math.floor(totalShiftMinutes / 60) + " hours " + (totalShiftMinutes % 60) + " minutes";
formattedHoursWorkedDisplay.textContent = "Net Billable Hours: " + formattedHours + " (" + decimalHours + " hours)";
resultDiv.style.backgroundColor = "#d4edda"; // Success background
formattedHoursWorkedDisplay.style.color = "#155724"; // Darker success text for readability
}
function clearForm() {
document.getElementById("startTime").value = "09:00";
document.getElementById("endTime").value = "17:00";
document.getElementById("breakDuration").value = "30";
document.getElementById("startDate").value = ""; // Clear date
document.getElementById("totalHoursWorked").textContent = "–";
document.getElementById("formattedHoursWorked").textContent = "–";
document.getElementById("calculationResult").style.backgroundColor = "#e9ecef"; // Reset background
}
// Optional: Trigger calculation on date change if needed, or just focus/blur
// For this calculator, explicit button click is sufficient.
Time Card Punch Calculator
Work Hours Summary
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Understanding and Using the Time Card Punch Calculator
The Time Card Punch Calculator is a simple yet essential tool for accurately determining the total hours worked by an employee on a given day. It takes into account the start time, end time, and any unpaid breaks, providing a clear summary of compensable work hours. This calculator is invaluable for payroll processing, employee time management, and ensuring fair compensation.
How it Works: The Math Behind the Calculation
The calculation involves a few key steps:
- 1. Time Conversion: The start and end times (provided in HH:MM format) are converted into a common unit, typically minutes or hours since midnight.
- 2. Total Duration Calculation: The difference between the end time and the start time is calculated to find the gross duration of the shift.
- 3. Break Subtraction: The duration of any unpaid breaks (specified in minutes) is subtracted from the total duration.
- 4. Formatting the Result: The final duration, representing the net working hours, is then formatted into a human-readable format (e.g., HH:MM or decimal hours).
For example, if an employee starts at 9:00 AM and ends at 5:00 PM with a 30-minute break:
- Start Time: 9:00 AM
- End Time: 5:00 PM (which is 17:00 in 24-hour format)
- Break Duration: 30 minutes
- Total Duration (End Time – Start Time): 17:00 – 9:00 = 8 hours (or 480 minutes).
- Net Work Hours: 480 minutes – 30 minutes (break) = 450 minutes.
- Formatted Result: 450 minutes is equal to 7 hours and 30 minutes (7.5 hours).
Key Use Cases:
- Payroll: Accurate calculation of hours for employee wages.
- Employee Self-Service: Allows employees to verify their logged hours.
- Project Management: Tracking time spent on specific tasks or projects.
- Compliance: Ensuring adherence to labor laws regarding work hours and breaks.
- Freelancers: Billing clients accurately based on time spent.
By ensuring accurate time tracking, businesses can maintain operational efficiency, foster trust with their employees, and avoid costly errors in payroll and compliance. The date input is included to help track time for specific days, crucial for historical data and daily reporting.