Hands stacking coins to illustrate saving, budgeting, or building financial growth

Blended Rate Calculator

Calculate the combined interest rate of multiple loans using the Blended Rate Calculator. Enter the loan balance and interest rate for each loan you want to include in the calculation. The calculator uses these values to determine a single weighted average interest rate across all loans. Use the result to better understand your overall borrowing cost and compare financing options more easily.

Enter the details for each loan to calculate the combined interest rate.

How a Blended Mortgage Rate Works

A blended rate estimates the weighted average interest rate across two or more loans. Instead of simply averaging the interest rates, the calculation considers the balance of each loan so that larger loan balances have a greater effect on the combined rate.

Blended Rate Formula

The break-even point estimates how long it may take for the monthly savings from refinancing to recover the upfront costs of the new loan. This can help you evaluate whether you expect to keep the mortgage long enough for the estimated savings to offset those costs.
Example
Estimated refinance closing costs: $6,000
Estimated monthly payment savings: $250
Estimated break-even period: $6,000 ÷ $250 = 24 months

In this simplified example, it would take approximately 24 months of estimated monthly savings to recover $6,000 in refinance costs.

If you have more than two loans, the same method can be extended by including each additional loan balance and rate.

When Is a Blended Rate Useful?

A blended rate can help when comparing the combined interest rate of a first mortgage and a HELOC or second mortgage with another financing option. It can provide a simple way to understand the approximate weighted rate across multiple mortgage-related debts.

If you are comparing an existing first mortgage with a new home-equity option, review our HELOC Loans and Second Mortgages guides. To estimate the payment impact of each scenario, use our Mortgage Payment Calculator.

What the Blended Rate Does Not Show

A blended rate does not compare total interest expense, monthly payments, loan terms, closing costs, fees, adjustable-rate changes, or the time required to repay each loan. Those factors should also be considered when comparing financing options.

Blended Rate Example

First Mortgage
$300,000 at 4.00%
Second Mortgage
$100,000 at 8.00%
Combined Loan Balance
$400,000
Calculation:
($300,000 × 4.00% + $100,000 × 8.00%) ÷ $400,000 = 5.00% blended rate
Important Calculator Limitations

The blended rate is a mathematical estimate and should not be treated as an APR, loan quote, approval, or recommendation to refinance. A lower or higher blended rate by itself does not determine which financing option will cost less. Actual borrowing costs can depend on loan terms, payments, fees, closing costs, rate structure, and how long each loan is expected to remain outstanding.

Rodney Rose Mortgage Team
Loans available nationwide
Low Rate, Low Fee.
"A Loan for every home"
Guaranteed Closing*
Rodney Rose, Loan Officer and Branch Manager
Rodney Rose
Loan Officer / Branch Manager
NMLS#: 1396861 DRE#: 00853403
C: (916) 232 3040
E: rrose@emortgagecapital.com
W: MortgageMarketUpdate.com
Better Business Bureau accreditation badge on a white background
Offices
By using our site, you agree to use our cookies. For more information, read our Privacy Policy