Blended Rate Calculator
This calculator helps you determine the blended rate when combining multiple quantities with different individual rates.
Calculate Blended Rate
Blended Rate: —
What is a Blended Rate?
A blended rate is the weighted average of multiple individual rates. It's calculated by summing the products of each quantity and its corresponding rate, then dividing by the total sum of all quantities. This is commonly used in finance to find an average interest rate across different loans or investments, but the concept applies to any scenario where you need to average rates across different volumes or amounts.
For example, if you have two investments, one of $1000 at 5% and another of $2000 at 7.5%, the blended rate helps you understand the overall return you are getting on your total invested capital. This calculator extends this by allowing you to incorporate up to three different quantities and their respective rates.
The formula used is:
Blended Rate = [(Quantity1 * Rate1) + (Quantity2 * Rate2) + (Quantity3 * Rate3)] / (Quantity1 + Quantity2 + Quantity3)
Note: The rates entered are assumed to be in the same unit (e.g., percentage points). The output will be in the same unit.
function calculateBlendedRate() {
var q1 = parseFloat(document.getElementById("quantity1").value);
var r1 = parseFloat(document.getElementById("rate1").value);
var q2 = parseFloat(document.getElementById("quantity2").value);
var r2 = parseFloat(document.getElementById("rate2").value);
var q3 = parseFloat(document.getElementById("quantity3").value);
var r3 = parseFloat(document.getElementById("rate3").value);
var blendedRateResultElement = document.getElementById("blendedRateResult");
if (isNaN(q1) || isNaN(r1) || isNaN(q2) || isNaN(r2) || isNaN(q3) || isNaN(r3)) {
blendedRateResultElement.textContent = "Please enter valid numbers for all fields.";
return;
}
var totalQuantity = q1 + q2 + q3;
var weightedSum = (q1 * r1) + (q2 * r2) + (q3 * r3);
if (totalQuantity === 0) {
blendedRateResultElement.textContent = "Total quantity cannot be zero.";
return;
}
var blendedRate = weightedSum / totalQuantity;
blendedRateResultElement.textContent = blendedRate.toFixed(2);
}
.blended-rate-calculator {
font-family: sans-serif;
max-width: 700px;
margin: 20px auto;
padding: 20px;
border: 1px solid #ccc;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.blended-rate-calculator h2 {
text-align: center;
color: #333;
margin-bottom: 20px;
}
.blended-rate-calculator .inputs {
display: grid;
grid-template-columns: repeat(2, 1fr);
gap: 15px;
margin-bottom: 20px;
}
.blended-rate-calculator .input-group {
display: flex;
flex-direction: column;
}
.blended-rate-calculator label {
margin-bottom: 5px;
font-weight: bold;
color: #555;
}
.blended-rate-calculator input[type="number"] {
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
}
.blended-rate-calculator button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
}
.blended-rate-calculator button:hover {
background-color: #0056b3;
}
.blended-rate-calculator .result {
margin-top: 25px;
padding: 15px;
background-color: #e9ecef;
border-radius: 4px;
text-align: center;
}
.blended-rate-calculator .result h3 {
margin: 0;
color: #333;
font-size: 1.3rem;
}
.blended-rate-calculator .result span {
font-weight: bold;
color: #007bff;
}
.blended-rate-calculator .explanation {
margin-top: 30px;
border-top: 1px solid #eee;
padding-top: 20px;
font-size: 0.95rem;
line-height: 1.6;
color: #444;
}
.blended-rate-calculator .explanation h3 {
margin-top: 0;
color: #333;
font-size: 1.2rem;
}
.blended-rate-calculator .explanation p {
margin-bottom: 15px;
}