Blended Rate Calculator

Calculate the weighted-average blended interest rate across multiple debts, plus total balance, annual interest cost, and each debt’s share of the total.

Blended rate comparison Calculate a balance-weighted APR across multiple debts, with each row contributing according to its share of the total balance.

Debt rows

Add or remove rows to compare balance-weighted borrowing costs.

Debt 1

Debt 2

Display currency

Switch the summary currency without changing the balance math or APR weighting.

Result

22.99%

Balance-weighted APR across 2 debts with a combined balance of $7,500.00.

Total balance
$7,500.00
Weighted annual interest
$1,724.25
Simple average APR
21.99%
Rate spread
6%

Comparison context

The blended APR is balance-weighted, so larger debts influence it more than smaller ones. Compared with a simple average, it is 1% higher.

Highest APR: 24.99%. Lowest APR: 18.99%. Largest balance share: 66.67%.

This is a rate snapshot, not a payoff forecast. It assumes the entered balances stay outstanding long enough for the annual interest estimate to matter.

Per-debt breakdown

Share of total balance

DebtBalanceShareAPRAnnual interestInterest share
Debt 1$5,000.0066.67%24.99%$1,249.5072.47%
Debt 2$2,500.0033.33%18.99%$474.7527.53%
Total$7,500.00100%Blended$1,724.25100%

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Debt & Credit

Blended rate calculator guide: weighted-average APR across multiple debts

A blended rate calculator shows the balance-weighted average APR across multiple debts or loans. This version takes the current balance and APR for each row, then calculates the combined balance, one-year interest implied by those balances, the blended APR, and how that result compares with a simple unweighted average of the entered rates.

Why a blended rate matters

If you have multiple debts at different APRs, a simple average can mislead because it gives the same weight to a small balance and a very large one. A blended rate corrects that by weighting each APR by its share of the total balance.

That makes the result useful for snapshot planning. It helps answer questions like whether the combined debt stack is closer to a 10% problem or a 20% problem, how much one high-rate balance is distorting the whole picture, and what a consolidation offer would need to beat to produce a meaningful rate improvement.

Core blended-rate maths

Each balance contributes annual interest equal to balance multiplied by APR. The blended APR is then the total weighted annual interest divided by the total balance. Because large balances contribute more dollars of interest, they also pull the blended APR more strongly than small balances do.

This calculator also shows the simple average APR so you can see the difference between a true balance-weighted result and a plain arithmetic mean. When the biggest balances also have the highest APRs, the blended APR will usually sit above the simple average.

Annual interest for a row = Balance x APR

Each debt contributes its own one-year simple interest amount before the totals are combined.

Blended APR = Total weighted annual interest / Total balance

This is the balance-weighted average rate across all entered rows.

Balance share = Row balance / Total balance

Each debt’s share of total balance shows how heavily it influences the blended result.

Worked example: 10,000 at 15% plus 5,000 at 10%

Suppose one balance is 10,000 at 15% APR and another is 5,000 at 10% APR. The total balance is 15,000 and the combined one-year interest implied by those balances is 2,000.

That produces a blended APR of about 13.33%, not the 12.50% simple average of the two rates. The larger 15% balance carries two-thirds of the total debt, so it pulls the weighted result upward and drives 75% of the annual interest in the breakdown.

What this estimate excludes

This page is a static rate snapshot rather than a repayment simulator. It does not model minimum payments, amortization, rate resets, fees, balance changes, consolidation costs, or the order in which debts would actually be paid down.

Use it to understand your current weighted borrowing cost. If you want to compare payoff strategies or a refinance offer, pair it with a debt payoff, debt consolidation, or loan comparison calculator.

Further reading

Frequently asked questions

Why is the blended APR different from the simple average APR?

Because the blended APR gives more weight to larger balances. A simple average treats each APR equally even if one debt is much larger than the others.

 Does a blended rate tell me how fast I will pay off the debt?

No. It is a snapshot of weighted borrowing cost, not a payoff model. Repayment speed depends on payment amounts, fees, and how balances change over time.

 Can I use this to judge a consolidation offer?

Yes, as a starting benchmark. A consolidation APR lower than the blended APR may help, but you still need to consider fees, term length, and total interest over time.

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