Blended Rate Calculator
Calculate the blended interest rate for multiple loans or investments with different rates and amounts.
Published by:
isCalculator Editorial Team
Was this calculator helpful?
How to use this tool?
This calculator computes the weighted average interest rate (blended rate) across multiple loans or investments. It uses the formula: Blended Rate = Σ(Amount × Rate) / Σ(Amount).
- Enter principal amounts – In each row, type the dollar amount (e.g., 10000) in the Amount ($) field.
- Enter interest rates – In the same row, type the annual interest rate as a percentage (e.g., 5.5 for 5.5%) in the Rate (%) field.
- Add or remove rows – Click Add Row to include more loans/investments. Use the trash icon to delete a row (at least one row must remain).
- Calculate – Click Calculate Blended Rate. The result shows:
- Blended Rate – The weighted average interest rate.
- Total Principal – Sum of all amounts.
- Total Interest – Total annual interest (principal × blended rate).
Note: All amounts must be non-negative numbers. If you see an error, check that every field is filled correctly and the total principal is greater than zero.
Previous Results
| Result | Inputs | Date |
|---|
Frequently Asked Questions
A blended rate is the weighted average interest rate of multiple loans or investments, calculated by dividing the total interest by the total principal.
Multiply each loan amount by its interest rate, sum these products, then divide by the total loan amount.
Yes, you can use it to find the average return rate of multiple investments with different amounts and rates.
