Blended Rate Calculator

What this calculator does

When you owe money in more than one place, a car loan here, a credit card there, a personal loan somewhere else, each sits at its own interest rate. That makes it hard to answer a simple question: overall, what rate am I really paying? This calculator answers it. It takes each balance and its rate and boils them down to one figure, the blended rate, which is the single effective rate across everything you owe.

It is the number that lets you see your whole debt as one thing, and it is exactly the number you need when you are deciding whether to consolidate.

How a blended rate is worked out

The key thing to understand is that a blended rate is a weighted average, not a plain one. It does not treat every rate equally. It weights each rate by how large its balance is, because a rate on a big balance affects you far more than the same rate on a small one.

The calculator works out the interest each balance contributes, adds all of that up, and divides by the total of all the balances. The result is the rate that, applied to your whole combined balance, would produce the same total interest as all your separate debts do together. In other words, it is your true overall rate, with the big balances pulling it toward their rates and the small ones barely nudging it.

A worked example, and why it is not a plain average

Say you owe three debts: 10,000 at 5%, 20,000 at 8%, and 5,000 at 12%. Enter them and the blended rate comes out to 7.714%, across a total balance of 35,000.

Now here is the part worth noticing. If you had just averaged the three rates, 5, 8, and 12, you would get 8.33%. But the real blended rate is lower, 7.714%, and the reason is the weighting. Your largest balance, the 20,000, sits at 8%, and your next largest, the 10,000, sits at a low 5%, so the blend gets pulled down toward those. The little 5,000 at a steep 12% barely moves the needle, because it is small. A plain average would have overstated your true rate, which is exactly why the weighting matters and why a blended rate is the honest figure.

Where a blended rate actually helps

The moment this number really earns its keep is when you are thinking about consolidating your debts into a single loan. The whole pitch of a consolidation loan is one simpler payment, often at a lower rate. But to know whether it is actually lower, you need something to compare the new rate against. Your blended rate is that benchmark. If a consolidation loan comes in below your blended rate, it may genuinely save you on interest. If it comes in above, it does not, no matter how much simpler one payment sounds.

Two cautions worth carrying, both from the CFPB. A lower monthly payment on a consolidation loan is sometimes just the result of stretching the debt over a longer time, which can mean paying more interest overall even at a lower rate. And a tempting low rate can be a temporary teaser that rises later. So use the blended rate as your yardstick, then look past the headline rate to the term and the fine print. If you want to run the consolidation itself, our debt consolidation calculator is built for that, and a balance transfer calculator helps if the plan is to move a balance to a lower-rate card.

How to use it

The tool starts with three rows, and you can add as many as you need with the Add Input Field button.

• Balance. How much you owe on that particular debt.
• Rate. The interest rate on that debt, as a percentage.

Fill in a balance and rate for each debt, add rows for any others, and press Calculate for your blended rate and total balance. Press Reset to start over.

Questions people ask

What is a blended interest rate?

It is the single effective rate across several debts, found by weighting each rate by its balance. It represents the overall rate you are really paying once all your balances are considered together.

Is a blended rate just the average of my rates?

No. A plain average treats every rate equally, but a blended rate weights each by its balance, so larger balances count more. That is why the blended rate can differ noticeably from a simple average of the rates.

How does this help me decide whether to consolidate?

Your blended rate is the benchmark to beat. If a consolidation loan offers a rate below your blended rate, it may save you interest. If it is higher, consolidating would cost you more, even if it simplifies your payments. Also check the term, since a longer one can raise the total interest.

References

The guidance on using an overall rate to judge a debt consolidation loan, and the cautions about longer terms and temporary teaser rates, follow the U.S. Consumer Financial Protection Bureau's consumer materials on consolidating debt.

1. Consumer Financial Protection Bureau. What do I need to know about consolidating my credit card debt? consumerfinance.gov
2. Consumer Financial Protection Bureau. Credit counseling, debt settlement, debt consolidation, and credit repair. consumerfinance.gov