Blended Rate Calculator

This blended rate calculator shows your weighted average interest rate across multiple loans. Enter loan balances and rates to see your true combined rate instantly.

Blended Rate Calculator | Weighted Average Interest Rate
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Loans / Debts

The blended rate is the weighted average interest rate across all loans, weighted by their balances. Useful for consolidating debt or refinancing analysis.

Blended Rate Summary
📊 Blended Rate: —
Number of Loans—
Total Loan Balance—
Blended Rate (Weighted Average)—
Simple Average Rate—
Highest Rate—
Lowest Rate—
Weighted Monthly Interest (Est.)—
Loan Breakdown & Weighting
LoanBalanceRateWeightContribution

Add loans to view breakdown.

Shows how each loan's balance weights its contribution to the blended rate.

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Hasnain Khan

Co-Founder, Techraxy

Hasnain Khan is a digital tools developer and Co-Founder of Techraxy, a platform dedicated to building modern web-based calculators and utility tools. He focuses on tool optimization, website performance, and creating accessible user experiences across categories like automotive, finance, construction, and everyday utilities.

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Introduction to Blended Rate Calculator

A blended rate is the weighted average interest rate across multiple loans or debts. It represents the true overall cost of borrowing when you have more than one loan. This is especially useful when consolidating debt, refinancing multiple loans, or evaluating a mixed portfolio of borrowing. Unlike a simple average, a blended rate accounts for the size of each loan, giving more weight to larger balances. For example, if you have a $200,000 mortgage at 6% and a $50,000 loan at 9%, your blended rate is closer to 6.6% than 7.5%. This Blended Rate Calculator helps you calculate this metric accurately. Enter your loan balances and interest rates, and the calculator instantly shows your weighted average rate and combined payment. Toolraxy built this calculator to help borrowers understand their true cost of debt.

How to Use This Blended Rate Calculator

              1. Enter the Balance of your first loan

              2. Enter the Interest Rate of your first loan

              3. Enter the Balance of your second loan

              4. Enter the Interest Rate of your second loan

              5. Add additional loans if needed

              6. Click Calculate to see your blended rate

              7. Review the weighted average rate and combined payment

              8. Adjust inputs to compare different scenarios

Formula Section

Blended rate (weighted average):

Blended Rate = Σ (Balanceᵢ × Rateᵢ) ÷ Σ Balanceᵢ

Total combined balance:

Total Balance = Balance₁ + Balance₂ + ... + Balanceₙ

Weight of each loan:

Weightᵢ = Balanceᵢ ÷ Total Balance

Combined monthly payment (interest-only estimate):

Combined Payment = Σ (Balanceᵢ × Rateᵢ ÷ 12 ÷ 100)

Simple (unweighted) average rate:

Simple Average = (Rate₁ + Rate₂ + ... + Rateₙ) ÷ n

Difference between blended and simple average:

Difference = Blended Rate – Simple Average

Where:

  • Balanceᵢ = Outstanding balance of each loan

  • Rateᵢ = Interest rate of each loan (as percentage)

  • n = Number of loans

  • Σ = Sum of all values

Real-Life Examples Section

  • Example scenario:

    • Loan 1: $300,000 mortgage at 6.0%

    • Loan 2: $50,000 personal loan at 10.0%

    • Loan 3: $20,000 car loan at 7.5%

    Calculations:

    • Total balance: $300,000 + $50,000 + $20,000 = **$370,000**

    • Weighted interest: ($300,000 × 6.0%) + ($50,000 × 10.0%) + ($20,000 × 7.5%)

    • Weighted interest: $18,000 + $5,000 + $1,500 = **$24,500**

    • Blended rate: ($24,500 ÷ $370,000) × 100 = 6.62%

    • Simple average: (6.0% + 10.0% + 7.5%) ÷ 3 = 7.83%

    • Difference: 6.62% – 7.83% = -1.21%

FAQs

1. What is a blended rate?
A blended rate is the weighted average interest rate across multiple loans or debts. It accounts for the size of each loan, giving more weight to larger balances. It represents your true overall cost of borrowing.

2. How is a blended rate calculated?
The blended rate is calculated by multiplying each loan balance by its interest rate, summing the results, and dividing by the total balance. It is a weighted average, not a simple average.

3. What is the difference between blended rate and average rate?
A simple average treats all loans equally regardless of size. A blended rate weights each loan by its balance. The blended rate is more accurate for understanding your true cost of debt.

4. Why is my blended rate lower than the average?
If your largest loan has the lowest rate, it pulls the blended rate down. This is common when a mortgage (large, low-rate) is combined with smaller, higher-rate debts.

5. What is the difference between blended rate and APR?
Blended rate is the average rate across multiple loans. APR is the annual cost of a single loan including fees. They measure different things. APR applies to one loan; blended rate applies to a portfolio.

6. How is a blended rate used in debt consolidation?
When consolidating debt, your new loan rate is compared to your blended rate. If the consolidation rate is lower than your blended rate, you save money. If higher, consolidation may cost more.

7. What is the difference between blended rate and weighted average?
They are the same concept. Blended rate is the term used in lending; weighted average is the general statistical term. Both account for the size of each component.

8. How accurate is this blended rate calculator?
It is mathematically precise based on standard weighted average formulas. However, actual loan payments depend on amortization schedules. This calculator provides an interest-rate-weighted average.

Disclaimer

This Blended Rate Calculator is provided for educational and planning purposes only. Results are based on standard weighted average formulas and the numbers you enter. Actual loan costs depend on amortization schedules, fees, and lender-specific terms. This tool does not constitute financial or lending advice. Consult a licensed financial advisor or lender before making borrowing or consolidation decisions. Toolraxy is not responsible for any actions taken based on these calculations.

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