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Blended Rate Mortgage Calculator

Calculate your blended mortgage rate instantly with our free Blended Rate Mortgage Calculator. Combine multiple loans and find your true interest rate easily.

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Formula: BR = (L₁×R₁ + Lβ‚‚Γ—Rβ‚‚ + … + Lβ‚™Γ—Rβ‚™) Γ· (L₁ + Lβ‚‚ + … + Lβ‚™)
Where L = Loan Balance  |  R = Interest Rate (decimal)
Loan Details
Enter each mortgage loan's balance and interest rate. Add as many loans as needed.
1 Loan 1
Loan Balance / Principal
$
Interest Rate
%
2 Loan 2
Loan Balance / Principal
$
Interest Rate
%
Currency Display
Rate Display Format

A blended rate mortgage helps you understand the true interest rate when you combine two or more loans into one. Many homeowners refinance, merge loans, or take additional mortgages without knowing their real average rate. This is where a Blended Rate Mortgage Calculator becomes useful.

We developed this online calculator to help users quickly and accurately calculate their blended mortgage rate. It is simple, fast, and designed for everyone, even without financial knowledge.

In this guide, you will learn what a blended rate mortgage is, how to calculate it, how to use our calculator, and how it can help you make better financial decisions.

What Is a Blended Rate Mortgage?

A blended rate mortgage is the combined interest rate of multiple loans based on their balances. Instead of averaging rates normally, it uses a weighted method.

This means bigger loans have more impact on the final rate than smaller ones.

For example, if you have one large loan at a low rate and a small loan at a high rate, the blended rate will be closer to the lower rate.

This method shows your real borrowing cost when loans are combined.

How Do You Calculate the Blended Mortgage Rate?

The blended mortgage rate is calculated using a weighted average formula. Each loan’s balance is multiplied by its interest rate. Then, all results are added and divided by the total loan amount.

This gives a fair and accurate average rate.

Blended Rate Mortgage Formula

The blended rate mortgage formula is:

Blended Rate = (Balance1 Γ— Rate1 + Balance2 Γ— Rate2 + Balance3 Γ— Rate3 + …) Γ· (Balance1 + Balance2 + Balance3 + …)

In simple words:

Add all β€œloan amount Γ— interest rate” values, then divide by the total loan balance.

Make sure all interest rates are in decimal format before calculation.

Example conversion:

4% = 0.04

5.5% = 0.055

How to Calculate a Blended Fee Rate?

A blended fee rate is calculated in the same way as a blended mortgage rate. Instead of interest rates, you use fee percentages.

The formula is:

Blended Fee Rate = (Amount1 Γ— Fee1 + Amount2 Γ— Fee2 + …) Γ· Total Amount

This method is used in finance, lending, and business to find combined costs.

How to Use the Online Blended Rate Mortgage Calculator

Using our online Blended Rate Mortgage Calculator is very easy.

  1. First, enter the balance of your first loan in the balance field.
  2. Second, enter the interest rate of that loan.
  3. Third, add another loan balance and rate.
  4. Fourth, choose whether your rates are in percentage or decimal format.
  5. Fifth, select your preferred currency if available.
  6. Sixth, click on the calculate button.

Within seconds, the calculator will show your blended interest rate, total loan balance, annual interest, and monthly interest.

You do not need to do any manual calculation. Everything is automatic and accurate.

Example Blended Rate Mortgage Calculation

Let us understand with a real example.

Suppose you have two loans.

Loan 1 balance is 200,000 and interest rate is 4%.

Loan 2 balance is 100,000 and interest rate is 5%.

Step 1: Convert rates to decimal.

4% = 0.04

5% = 0.05

Step 2: Multiply balance and rate.

200,000 Γ— 0.04 = 8,000

100,000 Γ— 0.05 = 5,000

Step 3: Add results.

8,000 + 5,000 = 13,000

Step 4: Add balances.

200,000 + 100,000 = 300,000

Step 5: Divide.

13,000 Γ· 300,000 = 0.04333

Step 6: Convert to percentage.

0.04333 = 4.33%

So, the blended mortgage rate is 4.33%.

This means your combined loan works like one mortgage at 4.33% interest.

Why Use a Blended Rate Mortgage Calculator?

A blended rate calculator helps you understand your real borrowing cost.

  • It helps you compare refinancing options.
  • It helps you plan monthly payments.
  • It helps you avoid hidden costs.
  • It saves time and reduces mistakes.
  • It supports smart financial decisions.

Whether you are refinancing, merging loans, or adding a second mortgage, this tool is very helpful.

Final Verdict

A blended rate mortgage shows the true interest cost when you combine multiple loans. Without calculating it, you may misunderstand your real financial situation.

Our Blended Rate Mortgage Calculator makes this process simple, accurate, and quick. It uses the correct weighted average formula and gives instant results.

If you are planning to refinance, merge loans, or analyze your mortgage, this calculator is the perfect tool for you.

Use it today to make better financial decisions with confidence.

FAQs

What is a blended rate mortgage in simple words?

A blended rate mortgage is the average interest rate of multiple loans, calculated based on their balances.

How accurate is a blended rate calculator?

If it uses the weighted average formula, it is mathematically accurate. Our calculator follows this standard method.

Can I use this calculator for more than two loans?

Yes, you can add multiple loans and calculate a combined blended rate.

Does this calculator include fees?

No, it calculates interest only. Fees must be added separately for full cost analysis.

Is blended rate useful for refinancing?

Yes, it helps you compare your current combined rate with new refinance offers.

Can I calculate monthly interest with this tool?

Yes, our calculator also shows estimated annual and monthly interest.