Effective Annual Rate Calculator
Convert a nominal annual interest rate into the effective annual rate (EAR) after compounding.
Calculate Effective Annual Rate
Convert a nominal annual interest rate into the effective annual rate (EAR) after compounding.
What This Effective Annual Rate Calculator Calculates
The effective annual rate shows the actual one-year rate after compounding is taken into account. It is useful when two loans, deposits, or investment products quote nominal rates with different compounding frequencies.
Formula and Method
EAR = (1 + r ÷ m)^m − 1.
The result uses only the values entered on this page. No account or sign-in is required, and the calculator itself runs locally in your browser.
How to Use the Calculator
- Enter the requested amount, rate, term, or cash-flow values using consistent units.
- Check whether a percentage is annual, periodic, nominal, or effective as indicated by the field label.
- Select Calculate and review the main result plus the supporting figures.
- Use Copy, Share, or Save Result Image only after you have reviewed the assumptions.
Worked Example
A 12% nominal annual rate compounded monthly has an effective annual rate higher than 12% because interest is applied twelve times during the year.
Common Uses
- Compare quoted borrowing rates that compound at different frequencies.
- Convert a nominal deposit or investment rate into a true annualized rate.
- Explain the effect of monthly, quarterly, or daily compounding.
How to Interpret the Result
The result is an estimate based on a simplified mathematical model. Compare it with the supporting figures rather than relying on one number alone. For borrowing or savings products, actual rates, fees, payment dates, taxes, and institutional rules can change the final amount.
Important Notes and Limitations
EAR is a mathematical rate conversion. It does not include account fees, taxes, penalties, or other product-specific charges unless those amounts are already reflected in the quoted rate. For important financial decisions, confirm current product terms and calculations with the relevant bank, lender, employer, accountant, or financial professional.
Frequently Asked Questions
Is EAR the same as a nominal interest rate?
No. A nominal rate does not fully reflect intra-year compounding, while EAR does.
Can EAR be lower than the nominal rate?
For positive rates with more than one compounding period, EAR is normally higher than the nominal rate.
Should I use EAR to compare loans?
EAR can make compounding comparable, but fees and product terms should also be considered.
Common Search Questions About Effective Annual Rate Calculator
How do I calculate effective annual rate?
Use the calculator on this page and enter the requested values. Convert a nominal annual interest rate into the effective annual rate (EAR) after compounding.
How can I get the effective annual rate result quickly?
Enter the required values, calculate, and review the result together with its supporting figures. On rebuilt mobile calculators, the answer is brought into the current viewport so the result is easy to find.
What values do I need to calculate effective annual rate?
Use the inputs shown in the calculator form and keep units consistent. For important decisions, use measured or verified values and review the page assumptions before relying on the result.