How to use this calculator
- Enter loan a balance, loan a nominal rate (%), loan b balance, loan b nominal rate (%).
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
Total balance must be positive. Rates must use the same compounding convention; fees and changing balances are excluded.
Worked example
With loan a balance = 10000, loan a nominal rate (%) = 5, loan b balance = 30000, loan b nominal rate (%) = 9, weighted nominal rate is approximately 8%.
What the result means
A weighted nominal rate does not replace the actual payment schedules or a fee-inclusive APR.
Common questions
How should I interpret weighted nominal rate?
A weighted nominal rate does not replace the actual payment schedules or a fee-inclusive APR.
What should I check before using this result?
Total balance must be positive. Rates must use the same compounding convention; fees and changing balances are excluded.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.