Rate Blend Calculator

Rate Blend Calculator

Effective Blended Rate

0.00%
Total Combined Amount: 0

Understanding the Weighted Average Rate Blend

A rate blend is a calculation used to find the weighted average of two different percentage values based on their relative sizes. This is most commonly applied in financial structuring where multiple funding sources with different yields or costs are combined into a single effective metric.

The Blended Rate Formula

To calculate the blended rate manually, you use the following mathematical formula:

Blended Rate = [(Amount A × Rate A) + (Amount B × Rate B)] / (Amount A + Amount B)

Why Use a Rate Blend?

Knowing the effective blend is critical for decision-making. For example, if you are considering consolidating a high-percentage debt with a lower-percentage fund, the blended rate shows you the "real" cost of your total capital. It allows for an "apples-to-apples" comparison against new financing offers.

Realistic Example

Imagine you have two primary sources of capital:

  • Source 1: 150,000 at a 4.00% rate
  • Source 2: 50,000 at an 8.00% rate

Even though 8.00% sounds high, it only represents 25% of your total 200,000 capital. The calculation would be:

((150,000 * 0.04) + (50,000 * 0.08)) / 200,000 = 0.05 (or 5.00%)

Your Effective Blended Rate is 5.00%, which is much closer to the 4.00% rate because the first amount has a higher "weight" in the total calculation.

function calculateBlendedRate() { var b1 = parseFloat(document.getElementById("balanceOne").value); var r1 = parseFloat(document.getElementById("rateOne").value); var b2 = parseFloat(document.getElementById("balanceTwo").value); var r2 = parseFloat(document.getElementById("rateTwo").value); // Validation if (isNaN(b1) || isNaN(r1) || isNaN(b2) || isNaN(r2)) { alert("Please enter valid numerical values for all fields."); return; } if (b1 + b2 <= 0) { alert("The sum of the amounts must be greater than zero."); return; } // Weighted Average Calculation var totalAmount = b1 + b2; var weightedSum = (b1 * r1) + (b2 * r2); var blendedRate = weightedSum / totalAmount; // Display Results document.getElementById("finalBlendedRate").innerText = blendedRate.toFixed(3) + "%"; document.getElementById("totalExposure").innerText = "Total Combined Amount: " + totalAmount.toLocaleString(); document.getElementById("blendResultContainer").style.display = "block"; // Smooth scroll to result document.getElementById("blendResultContainer").scrollIntoView({ behavior: 'smooth', block: 'nearest' }); }

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