Timesheet Hours Calculator
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f8f9fa;
color: #333;
line-height: 1.6;
margin: 0;
padding: 20px;
}
.timesheet-calc-container {
max-width: 700px;
margin: 30px auto;
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
border: 1px solid #e0e0e0;
}
h1, h2 {
color: #004a99;
text-align: center;
margin-bottom: 25px;
}
.input-group {
margin-bottom: 20px;
display: flex;
align-items: center;
gap: 15px;
flex-wrap: wrap; /* Allows items to wrap on smaller screens */
}
.input-group label {
flex: 1 1 150px; /* Grow, shrink, base width */
font-weight: 600;
color: #004a99;
margin-bottom: 5px; /* Space for multiline labels */
}
.input-group input[type="number"],
.input-group input[type="time"] {
flex: 1 1 200px; /* Grow, shrink, base width */
padding: 10px 12px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box; /* Include padding and border in the element's total width and height */
}
.input-group input[type="number"]:focus,
.input-group input[type="time"]:focus {
border-color: #004a99;
outline: none;
box-shadow: 0 0 0 3px rgba(0, 74, 153, 0.2);
}
button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #004a99;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease, transform 0.2s ease;
margin-top: 20px;
}
button:hover {
background-color: #003366;
transform: translateY(-2px);
}
button:active {
transform: translateY(0);
}
#result {
margin-top: 30px;
padding: 20px;
background-color: #e9ecef;
border: 1px solid #dee2e6;
border-radius: 4px;
text-align: center;
}
#totalHours, #totalMinutes {
font-size: 1.8rem;
font-weight: bold;
color: #28a745;
}
.explanation {
margin-top: 40px;
padding: 25px;
background-color: #ffffff;
border: 1px solid #e0e0e0;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}
.explanation h3 {
color: #004a99;
text-align: left;
margin-bottom: 15px;
}
.explanation p, .explanation ul {
color: #555;
}
.explanation ul {
padding-left: 20px;
}
.explanation li {
margin-bottom: 10px;
}
@media (max-width: 600px) {
.input-group {
flex-direction: column;
align-items: stretch;
}
.input-group label {
flex-basis: auto; /* Reset flex-basis for column layout */
margin-bottom: 8px;
}
.input-group input[type="number"],
.input-group input[type="time"] {
flex-basis: auto; /* Reset flex-basis for column layout */
width: 100%;
}
}
Timesheet Hours Calculator
Understanding Your Timesheet Calculation
Accurately tracking work hours is fundamental for payroll, project management, and understanding productivity. This calculator simplifies the process of determining total billable or worked hours between a start and end time, factoring in any breaks taken.
How the Calculation Works:
The calculator performs a straightforward time difference calculation and then subtracts any specified break time.
- Time Difference: It first calculates the duration between your specified 'Start Time' and 'End Time'. This is done by converting both times into minutes from midnight and finding the difference.
- Break Subtraction: The 'Break Duration' (entered in minutes) is then subtracted from this initial time difference.
- Result Formatting: The final duration is then presented in a clear Hours:Minutes format.
Formula:
Total Worked Hours = (End Time – Start Time) – Break Duration (in minutes)
Where 'End Time' and 'Start Time' are converted to a consistent unit (e.g., minutes from midnight).
Use Cases:
- Employees: Quickly verify pay stubs, track overtime, or ensure accurate time logging for hourly wages.
- Freelancers & Contractors: Accurately log billable hours for invoices, ensuring fair compensation for services rendered.
- Project Managers: Monitor time spent on tasks or projects, aiding in resource allocation and budget adherence.
- Small Business Owners: Streamline payroll processing by having a reliable method for calculating employee hours.
Using this calculator ensures consistency and accuracy in time tracking, saving time and reducing potential errors in payroll and billing.
function calculateHours() {
var startTimeInput = document.getElementById("startTime").value;
var endTimeInput = document.getElementById("endTime").value;
var breakDurationMinutesInput = document.getElementById("breakDurationMinutes").value;
var totalHoursElement = document.getElementById("totalHours");
var totalMinutesElement = document.getElementById("totalMinutes");
// Clear previous results
totalHoursElement.textContent = '–';
totalMinutesElement.textContent = '–';
// Input Validation
if (!startTimeInput || !endTimeInput || breakDurationMinutesInput === "") {
alert("Please fill in all fields.");
return;
}
var breakDurationMinutes = parseInt(breakDurationMinutesInput, 10);
if (isNaN(breakDurationMinutes) || breakDurationMinutes < 0) {
alert("Break duration must be a non-negative number.");
return;
}
// Parse start and end times
var startParts = startTimeInput.split(':');
var endParts = endTimeInput.split(':');
var startHour = parseInt(startParts[0], 10);
var startMinute = parseInt(startParts[1], 10);
var endHour = parseInt(endParts[0], 10);
var endMinute = parseInt(endParts[1], 10);
// Convert times to total minutes from midnight
var startTotalMinutes = (startHour * 60) + startMinute;
var endTotalMinutes = (endHour * 60) + endMinute;
// Handle cases where end time is on the next day (e.g., working overnight)
if (endTotalMinutes < startTotalMinutes) {
endTotalMinutes += 24 * 60; // Add minutes for a full day
}
var totalDurationMinutes = endTotalMinutes – startTotalMinutes;
// Subtract break time
var actualWorkedMinutes = totalDurationMinutes – breakDurationMinutes;
// Ensure actualWorkedMinutes is not negative
if (actualWorkedMinutes < 0) {
actualWorkedMinutes = 0;
}
// Calculate final hours and minutes
var finalHours = Math.floor(actualWorkedMinutes / 60);
var finalMinutes = actualWorkedMinutes % 60;
// Display results
totalHoursElement.textContent = String(finalHours).padStart(2, '0');
totalMinutesElement.textContent = String(finalMinutes).padStart(2, '0');
}