Blended Rate Calculator

Updated May 24, 2026 By Jehan Wadia

Introduction

A blended interest rate is the average rate you pay across all your loans, weighted by how much you owe on each one. If you have two or more loans with different rates, this calculator finds your single combined rate in seconds. Just enter each loan's balance and interest rate. You can also add the loan term to see your monthly payment, total interest, and total cost. The tool then shows charts and a full breakdown so you can see exactly where your money goes.

How to Use Our Blended Rate Calculator

Enter the details for each of your loans below. The calculator will find your blended interest rate, total monthly payment, and total interest paid across all loans.

Loan Balance: Type the amount you still owe on each loan in dollars. For example, enter 145000 for a $145,000 loan.

Annual Interest Rate: Type the yearly interest rate for each loan as a percent. For example, enter 6.75 for a 6.75% rate. If you need to compare how your rate translates into annual yield, our APY Calculator can help with that conversion.

Loan Term (Optional): Type the length of each loan in years. For example, enter 30 for a 30-year mortgage. Leave this blank if you only want the blended rate without payment details.

Add Loan: Click the "Add Loan" button to include more loans in your calculation. You must have at least two loans.

Calculate: Click the "Calculate" button to see your blended interest rate, combined monthly payment, total interest, and charts that break down each loan side by side.

Reset: Click the "Reset" button to clear your entries and start over with the default example loans.

What Is a Blended Interest Rate?

A blended interest rate is the average interest rate across all your loans, weighted by how much you owe on each one. If you have two or more loans with different rates, the blended rate tells you your true overall cost of borrowing. Bigger loans pull the blended rate closer to their rate, while smaller loans have less effect. The underlying math is similar to what our Weighted Average Calculator performs, applied specifically to interest rates and loan balances.

How to Calculate a Blended Rate

To find your blended rate, multiply each loan balance by its interest rate. Add those numbers together. Then divide by your total combined balance. The result is your weighted average interest rate. This calculator does all that math for you instantly. If you want to see how interest builds over time on any individual loan, our Compound Interest Calculator is a great companion tool, or try the Simple Interest Calculator for a straightforward look at interest accumulation.

Why the Blended Rate Matters

Knowing your blended rate helps you make smarter money decisions. For example, if someone offers to refinance all your loans into one new loan, you can compare the new rate to your blended rate. If the new rate is lower, refinancing could save you money. If it is higher, you are better off keeping your current loans. Use our Refinance Calculator to run that comparison in detail. You can also check the full annual percentage rate with our APR Calculator to make sure fees are not erasing any rate savings.

When to Use This Calculator

This tool is useful when you have multiple loans such as a mortgage, car loan, student loan, or personal loan. It works for any type of debt with a fixed interest rate. Enter each loan's balance and rate to see your blended rate right away. Adding the loan term is optional but lets you also see monthly payments and total interest paid over time.

For specific loan types, you may also find these tools helpful: our Mortgage Calculator for home loans, Auto Loan Calculator for vehicle financing, Student Loan Calculator for education debt, or the general Loan Calculator for any fixed-rate loan. If you want to see a full payment schedule for any of your loans, the Amortization Calculator breaks down every payment into principal and interest. And if you are focused on paying off multiple debts strategically, our Debt Avalanche Calculator and Debt Snowball Calculator can help you build a payoff plan that saves the most interest or keeps you motivated.

Frequently asked questions

What does the blended rate tell me that individual rates do not?

The blended rate gives you one single number that shows your true overall borrowing cost across all loans. Individual rates only show the cost of each loan by itself. The blended rate accounts for how much you owe on each loan, so a large loan with a high rate pulls the blended rate up more than a small loan with the same high rate. This makes it easy to compare your current debt cost against a single refinance offer or new loan option.

Can I use this calculator for different types of loans at the same time?

Yes. You can mix any types of loans together. Mortgages, car loans, student loans, personal loans, and credit lines can all go into the same calculation. The calculator only needs each loan's balance and interest rate. The loan type does not change how the blended rate math works.

Why is the loan term optional?

The loan term is only needed to calculate monthly payments and total interest paid over time. If you just want to know your blended interest rate, you do not need the term at all. The blended rate formula only uses balances and interest rates.

What happens if I leave the loan term blank for one loan but fill it in for another?

The calculator will still find your blended rate using all loans. For the loan with a term, it will show the monthly payment, total interest, and total cost. For the loan without a term, those fields will show as not available. The total monthly payment and total interest in the summary will only include loans that have a term entered.

How many loans can I add to this calculator?

You need at least two loans, but you can add as many as you want by clicking the Add Loan button. There is no upper limit built into the tool.

Does this calculator work for variable rate loans?

It works best for fixed-rate loans. If you have a variable rate loan, you can enter the current rate to get a snapshot of your blended rate right now. Just keep in mind the blended rate will change whenever your variable rate changes.

What is the weight shown in the breakdown table?

The weight is the percentage of your total debt that each loan makes up. For example, if you owe $100,000 total and one loan is $75,000, that loan's weight is 75%. Loans with higher weight have a bigger effect on your blended rate.

What does the Monthly Payment Breakdown chart show?

It shows how your first monthly payment on each loan splits between principal and interest. The principal portion is the part that reduces what you owe. The interest portion is the cost of borrowing. This chart only appears for loans where you entered a term.

What does the Total Cost Composition chart show?

It shows how much of your total cost goes to paying back the original loan amounts (principal) versus how much goes to interest charges. This helps you see how expensive your borrowing really is over the full life of your loans.

Is the blended rate the same as an APR?

No. The blended rate is a weighted average of your interest rates only. An APR includes fees, closing costs, and other charges on top of the interest rate. Your blended rate will usually be lower than a combined APR because it does not include those extra costs.

Can I use this to decide which loan to pay off first?

The calculator shows you each loan's rate and weight, which helps you see which loan costs you the most. Paying off the loan with the highest interest rate first will lower your blended rate the fastest. However, this tool is designed to calculate the blended rate, not build a payoff plan.

Does the calculator account for extra payments or prepayments?

No. The monthly payment and total interest calculations assume you make the standard payment every month for the full loan term. Extra payments are not factored in.

Why does my blended rate sit closer to my largest loan's rate?

Because the blended rate is weighted by balance. A loan with a bigger balance has more influence on the average. If your largest loan has a 7% rate and your smallest has a 4% rate, the blended rate will be much closer to 7% than to 4%.

What if one of my loans has a 0% interest rate?

That is fine. Enter 0 as the interest rate. The 0% loan will pull your blended rate down based on how large that loan's balance is compared to your other loans.