Blended Rate Mortgage Calculator

Calculate the weighted average interest rate when combining multiple mortgages.

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Blended Rate

Enter up to three mortgage balances and rates.

Weighted average rate
0%
Total debt: $0
Total debt
$0
Blended rate
0%
Weighted average
0%
Annual interest cost
$0
Monthly interest
$0
Rate spread
0%

Worked example

With the default inputs shown below, this calculator returns the following results:

InputValue
Mortgage 1 balance ($)$250,000
Mortgage 1 rate (%)6%
Mortgage 2 balance ($)$50,000
Mortgage 2 rate (%)7%
Mortgage 3 balance ($)$0
Mortgage 3 rate (%)0%
ResultValue
Weighted average rate6.17%
Total debt$300,000
Blended rate6.17%
Weighted average6.17%
Annual interest cost$18,500
Monthly interest$1,542

Values shown are produced by this page in your browser; change any input to update them.

How to use the Blended Rate

  1. Mortgage 1 balance ($) — default $250,000
  2. Mortgage 1 rate (%) — default 6%
  3. Mortgage 2 balance ($) — default $50,000
  4. Mortgage 2 rate (%) — default 7%
  5. Mortgage 3 balance ($) — default $0
  6. Mortgage 3 rate (%) — default 0%
  7. Press Calculate to update the results instantly.

Frequently asked questions

The weighted average of the rates on all your loans: total annual interest ÷ total balance. It tells you what you are effectively paying overall.
When you consolidate loans, borrow more from the same lender, or compare a single new loan against keeping several existing ones.
No. APR includes fees and is calculated on one loan, while the blended rate only averages interest rates across several balances.

Sources & references