Time Calculator (Hours & Minutes)
:root {
–primary-blue: #004a99;
–success-green: #28a745;
–light-background: #f8f9fa;
–white: #ffffff;
–dark-gray: #333333;
–border-color: #dee2e6;
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: var(–light-background);
color: var(–dark-gray);
line-height: 1.6;
margin: 0;
padding: 20px;
display: flex;
flex-direction: column;
align-items: center;
}
.loan-calc-container {
background-color: var(–white);
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
width: 100%;
max-width: 700px;
margin-bottom: 30px;
}
h1 {
color: var(–primary-blue);
text-align: center;
margin-bottom: 25px;
font-size: 2.2em;
}
h2 {
color: var(–primary-blue);
margin-top: 30px;
margin-bottom: 15px;
border-bottom: 2px solid var(–primary-blue);
padding-bottom: 5px;
font-size: 1.6em;
}
.input-group {
margin-bottom: 20px;
padding: 15px;
border: 1px solid var(–border-color);
border-radius: 5px;
background-color: var(–white);
display: flex;
flex-wrap: wrap;
gap: 20px;
align-items: center;
}
.input-group label {
font-weight: bold;
color: var(–primary-blue);
margin-bottom: 5px;
flex: 1 1 150px; /* Allow labels to grow/shrink */
text-align: left;
}
.input-group input[type="number"] {
padding: 10px 15px;
border: 1px solid var(–border-color);
border-radius: 4px;
font-size: 1em;
flex: 2 2 180px; /* Allow inputs to grow/shrink */
box-sizing: border-box; /* Include padding and border in the element's total width and height */
}
.input-group input[type="number"]:focus {
outline: none;
border-color: var(–primary-blue);
box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.25);
}
.button-group {
text-align: center;
margin-top: 25px;
}
button {
background-color: var(–primary-blue);
color: var(–white);
padding: 12px 25px;
border: none;
border-radius: 5px;
font-size: 1.1em;
cursor: pointer;
transition: background-color 0.3s ease, transform 0.2s ease;
}
button:hover {
background-color: #003366;
transform: translateY(-2px);
}
button:active {
transform: translateY(0);
}
#result {
margin-top: 25px;
padding: 20px;
background-color: var(–success-green);
color: var(–white);
text-align: center;
font-size: 1.5em;
font-weight: bold;
border-radius: 5px;
box-shadow: 0 2px 10px rgba(40, 167, 69, 0.3);
}
.article-section {
background-color: var(–white);
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
width: 100%;
max-width: 700px;
}
.article-section p {
margin-bottom: 15px;
}
.article-section ul {
margin-left: 20px;
margin-bottom: 15px;
}
.article-section li {
margin-bottom: 8px;
}
/* Responsive adjustments */
@media (max-width: 600px) {
.loan-calc-container, .article-section {
padding: 20px;
}
h1 {
font-size: 1.8em;
}
h2 {
font-size: 1.4em;
}
.input-group {
flex-direction: column;
align-items: stretch;
}
.input-group label, .input-group input[type="number"] {
flex: none; /* Remove flex properties for column layout */
width: 100%;
}
button {
font-size: 1em;
padding: 10px 20px;
}
#result {
font-size: 1.3em;
}
}
Time Calculator (Hours & Minutes)
Hours 1:
Minutes 1:
Hours 2:
Minutes 2:
Calculate Difference
Add Times
Reset
Understanding the Time Calculator
The Time Calculator is a simple yet powerful tool designed to perform basic arithmetic operations on durations expressed in hours and minutes. Whether you need to add two time intervals, find the difference between two times, or simply convert units, this calculator simplifies the process.
How it Works
The calculator takes two time durations, each consisting of hours and minutes. It then performs the selected operation (addition or subtraction) by converting everything into a common unit (minutes), performing the calculation, and then converting the result back into hours and minutes.
The Math Behind the Operations:
Conversion to Minutes: To add or subtract times, it's easiest to convert each duration entirely into minutes. A duration of X hours and Y minutes is equal to (X * 60 + Y) minutes.Addition:
Convert Time 1 (Hours 1, Minutes 1) to total minutes: totalMinutes1 = (hours1 * 60) + minutes1
Convert Time 2 (Hours 2, Minutes 2) to total minutes: totalMinutes2 = (hours2 * 60) + minutes2
Add the total minutes: sumTotalMinutes = totalMinutes1 + totalMinutes2
Convert the sum back to hours and minutes:
Result Hours = Math.floor(sumTotalMinutes / 60)
Result Minutes = sumTotalMinutes % 60
Difference (Subtraction):
Convert Time 1 (Hours 1, Minutes 1) to total minutes: totalMinutes1 = (hours1 * 60) + minutes1
Convert Time 2 (Hours 2, Minutes 2) to total minutes: totalMinutes2 = (hours2 * 60) + minutes2
Calculate the difference. Ensure the larger time is subtracted from the smaller time to get a non-negative result. If totalMinutes1 >= totalMinutes2:
Difference Minutes = totalMinutes1 - totalMinutes2
If totalMinutes2 > totalMinutes1:
Difference Minutes = totalMinutes2 - totalMinutes1
Convert the difference back to hours and minutes:
Result Hours = Math.floor(differenceMinutes / 60)
Result Minutes = differenceMinutes % 60
Use Cases:
Project Management: Estimating or summing up task durations.Scheduling: Calculating total time for events or travel.Work Logs: Tracking hours worked on a project.Personal Planning: Figuring out how much time is needed for a series of activities.Educational Purposes: Teaching basic time arithmetic.
By providing a clear interface and accurate calculations, this Time Calculator helps users quickly and efficiently manage their time-related tasks.
function getInputValue(id) {
var value = parseFloat(document.getElementById(id).value);
if (isNaN(value) || value < 0) {
return 0; // Default to 0 for invalid or negative inputs
}
return value;
}
function formatTime(hours, minutes) {
var hoursStr = Math.floor(hours).toString();
var minutesStr = Math.floor(minutes).toString();
if (minutesStr.length = totalMinutes2) {
differenceMinutes = totalMinutes1 – totalMinutes2;
} else {
differenceMinutes = totalMinutes2 – totalMinutes1;
}
var resultHours = Math.floor(differenceMinutes / 60);
var resultMinutes = differenceMinutes % 60;
document.getElementById('result').innerText = "Time Difference: " + formatTime(resultHours, resultMinutes);
}
function addTimes() {
var hours1 = getInputValue('hours1');
var minutes1 = getInputValue('minutes1');
var hours2 = getInputValue('hours2');
var minutes2 = getInputValue('minutes2');
// Ensure minutes are within the valid range (0-59)
minutes1 = Math.min(minutes1, 59);
minutes2 = Math.min(minutes2, 59);
var totalMinutes1 = (hours1 * 60) + minutes1;
var totalMinutes2 = (hours2 * 60) + minutes2;
var sumTotalMinutes = totalMinutes1 + totalMinutes2;
var resultHours = Math.floor(sumTotalMinutes / 60);
var resultMinutes = sumTotalMinutes % 60;
document.getElementById('result').innerText = "Total Time: " + formatTime(resultHours, resultMinutes);
}
function resetFields() {
document.getElementById('hours1').value = ";
document.getElementById('minutes1').value = ";
document.getElementById('hours2').value = ";
document.getElementById('minutes2').value = ";
document.getElementById('result').innerText = ";
}