This calculator helps you accurately determine the total number of hours worked between a start and end time, factoring in any unpaid breaks.
How it Works:
The calculation is straightforward:
Convert Times to Minutes: Both the start time and end time are converted into total minutes from midnight. For example, 09:00 AM becomes 9 * 60 = 540 minutes, and 5:00 PM (17:00) becomes 17 * 60 = 1020 minutes.
Calculate Total Time Span: The difference between the end time in minutes and the start time in minutes gives the gross duration worked. (e.g., 1020 – 540 = 480 minutes).
Subtract Break Time: The duration of unpaid breaks, entered in minutes, is subtracted from the total time span. (e.g., 480 – 30 = 450 minutes).
Convert Back to Hours and Minutes: The remaining minutes are converted back into a standard hours and minutes format. (e.g., 450 minutes / 60 minutes/hour = 7 hours and 30 minutes).
Use Cases:
This calculator is invaluable for:
Employees: To accurately track hours for payroll, ensure fair compensation, and manage their work-life balance.
Freelancers: To bill clients precisely for the time spent on projects.
Employers: To manage employee attendance, calculate wages, and ensure compliance with labor laws regarding working hours and breaks.
Project Management: To estimate and track time spent on various tasks.
By providing clear inputs for start time, end time, and break duration, this tool simplifies the process of calculating actual paid or productive working hours.
function calculateWorkHours() {
var startTimeInput = document.getElementById("startTime").value;
var endTimeInput = document.getElementById("endTime").value;
var breakDurationInput = document.getElementById("breakDuration").value;
var resultDiv = document.getElementById("result").getElementsByTagName("span")[0];
if (!startTimeInput || !endTimeInput) {
resultDiv.textContent = "Please enter both start and end times.";
return;
}
var breakDuration = parseInt(breakDurationInput, 10);
if (isNaN(breakDuration) || breakDuration = startTimeInMinutes) {
totalMinutesWorked = endTimeInMinutes – startTimeInMinutes;
} else {
// Handle overnight shifts: add 24 hours worth of minutes
totalMinutesWorked = (24 * 60 – startTimeInMinutes) + endTimeInMinutes;
}
var netMinutesWorked = totalMinutesWorked – breakDuration;
if (netMinutesWorked < 0) {
netMinutesWorked = 0;
}
var hours = Math.floor(netMinutesWorked / 60);
var minutes = netMinutesWorked % 60;
var formattedHours = hours < 10 ? '0' + hours : hours;
var formattedMinutes = minutes < 10 ? '0' + minutes : minutes;
resultDiv.textContent = formattedHours + ":" + formattedMinutes;
}