Finance calculator
Effective Interest Rate Calculator
Convert a nominal annual interest rate into an effective annual rate after compounding.
Formula
Effective annual rate
EAR = (1 + nominal rate / compounds)^compounds - 1
8% compounded monthly has an effective annual rate above 8%.
FAQs
Why is effective rate higher?+
Compounding earns or charges interest on interest during the year.
Can compounds per year be 1?+
Yes. Annual compounding makes nominal and effective rates match.
How does the Effective Interest Rate Calculator calculate the result?+
It uses the Effective annual rate: EAR = (1 + nominal rate / compounds)^compounds - 1. 8% compounded monthly has an effective annual rate above 8%.
What information do I need to use the Effective Interest Rate Calculator?+
Convert a nominal annual interest rate into an effective annual rate after compounding.
How accurate is the Effective Interest Rate Calculator?+
Effective Interest Rate Calculator applies the formula and assumptions shown on this page. Results may be rounded for readability, so verify changing rates, thresholds, medical guidance, or legal rules with the cited source or a qualified professional.
What should I check before using the Effective Interest Rate Calculator result?+
Check that the units, dates, rates, and assumptions match your situation. Change one input at a time to understand which values have the largest effect on the result.
Finance guide
How to use the Effective Interest Rate Calculator
Convert a nominal annual interest rate into an effective annual rate after compounding. The page also explains the effective annual rate and shows a practical example: 8% compounded monthly has an effective annual rate above 8%.
- 1
Enter your details
Enter the values for the effective interest rate calculator scenario you want to check.
- 2
Check the calculation
Review the result alongside the effective annual rate: EAR = (1 + nominal rate / compounds)^compounds - 1.
- 3
Compare scenarios
Change one or more inputs to see how they affect the effective Interest Rate Calculator result before you use the estimate.
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