Calculate Rate of Growth Over Time
function calculateGrowthRate() {
var initialValue = parseFloat(document.getElementById("initialValue").value);
var finalValue = parseFloat(document.getElementById("finalValue").value);
var timePeriod = parseFloat(document.getElementById("timePeriod").value);
var resultDiv = document.getElementById("result");
if (isNaN(initialValue) || isNaN(finalValue) || isNaN(timePeriod)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (initialValue <= 0) {
resultDiv.innerHTML = "Initial value must be greater than zero.";
return;
}
if (timePeriod <= 0) {
resultDiv.innerHTML = "Time period must be greater than zero.";
return;
}
// Calculate the growth factor
var growthFactor = finalValue / initialValue;
// Calculate the annual growth rate using the formula: ((FV/IV)^(1/T)) – 1
var annualGrowthRate = Math.pow(growthFactor, 1 / timePeriod) – 1;
// Convert to percentage
var growthRatePercentage = annualGrowthRate * 100;
resultDiv.innerHTML = "The average annual rate of growth is: " + growthRatePercentage.toFixed(2) + "%";
}
.calculator-widget {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 5px;
max-width: 400px;
margin: 20px auto;
box-shadow: 2px 2px 8px rgba(0,0,0,0.1);
}
.calculator-widget h2 {
text-align: center;
margin-bottom: 15px;
color: #333;
}
.input-section {
margin-bottom: 20px;
}
.input-section label {
display: block;
margin-bottom: 8px;
font-weight: bold;
color: #555;
}
.input-section input[type="number"] {
width: calc(100% – 20px);
padding: 10px;
margin-bottom: 15px;
border: 1px solid #ddd;
border-radius: 4px;
box-sizing: border-box;
}
.calculator-widget button {
display: block;
width: 100%;
padding: 12px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
transition: background-color 0.3s ease;
}
.calculator-widget button:hover {
background-color: #45a049;
}
#result {
margin-top: 20px;
padding: 15px;
background-color: #eefcff;
border: 1px solid #b3e0f0;
border-radius: 4px;
text-align: center;
font-size: 1.1em;
color: #333;
}