All tools

Blended Loan Interest Rate Calculator

Math

Compute the single weighted-average interest rate across a list of loan balances (e.g. credit cards or student loans considered for consolidation), plus total balance and combined monthly and annual interest accrual

Enter each loan's balance and interest rate and this tool weights every rate by its share of the combined balance to produce the single blended rate that represents all of them together. It also breaks out each loan's monthly interest and share of the total, plus the combined monthly and annual interest accrual, which is the number most people actually want when deciding whether consolidating several debts into one new loan is worth it. It is pure arithmetic over the numbers you enter, there is no live rate lookup or credit account connection involved.

financeloaninterestweighted-averagedebt-consolidation

How to use Blended Loan Interest Rate Calculator

  • 1.Add each loan's balance and annual interest rate as a percent.
  • 2.Read the blended rate, total balance, and combined monthly/annual interest at the top.
  • 3.Check each loan's row for its individual monthly interest and share of the total balance.

Frequently asked questions

How is the blended rate calculated?
It's a balance-weighted average: each loan's rate is multiplied by its balance, those are summed, and the total is divided by the combined balance, so a larger loan pulls the blended rate closer to its own rate.
Is the blended rate the same as what I'd pay after consolidating?
Not necessarily. It's the mathematical average of what you're paying today; an actual consolidation loan will have its own separately-negotiated rate, which could be higher or lower depending on your credit and the lender.
Why does totalAnnualInterest not exactly equal totalMonthlyInterest times 12 down to the cent?
Each loan's monthly interest is rounded to the cent before summing, so multiplying the already-rounded monthly total by 12 can differ from summing 12 months of unrounded interest by a fraction of a cent.
Does this account for principal paydown over time?
No, it's a single-point-in-time snapshot based on the current balances and rates you enter, not an amortization schedule. Use the Loan / Mortgage Calculator for a full payoff schedule on an individual loan.

Use via API, SDK, or MCP

cURL# Free: 1,000 req/day · Pro: 10,000 req/day
curl -X POST https://api.utilix.tech/v1/tools/blended-loan-rate-calculator \
  -H "Authorization: Bearer utx_live_..." \
  -H "Content-Type: application/json" \
  -d '{"loans":[{"label":"Credit card","balance":10000,"ratePercent":20},{"label":"Student loan","balance":5000,"ratePercent":5}]}'

Get an API key from your dashboard · Full API docs →

Related tools

EMI CalculatorCompute the equated monthly installment, total interest, and a year-by-year breakdown for a loan from principal, rate, and tenureMathLoan / Mortgage CalculatorCompute monthly payment, total interest, and a full amortization schedule from principal, rate, and termMathSimple Interest CalculatorCompute simple (non-compounding) interest and total payoff from principal, annual rate, and termMath