Effective Annual Rate (EAR) Calculator

Form

Results

Periodic rate

0%

EAR

0%

1

What is EAR Calculator?

Effective annual rate includes the effect of compounding within a year.

2

How to Use This Calculator

  1. Enter or select Annual interest rate, Compounding frequency.
  2. Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
  3. Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
3

Formula Used

EAR = (1+nominal annual rate/m)^m−1
4

Variables Explained

InputWhat it means
Annual interest rateThe quoted rate for the time basis shown in the form; an annual rate is not a monthly rate.
Compounding frequencyHow often the event, payment or administration occurs; use the form’s stated schedule.
5

Worked Example

A 12% nominal rate compounded monthly gives about 12.68% effective annual interest.

6

Why Use This Calculator?

Compare the result with the underlying statement, budget or proposed transaction. It is most useful when every amount uses the same reporting period and the same accounting definition.

7

Common Mistakes

    • Match the number of compounding periods to the quoted nominal rate.
8

Frequently Asked Questions

Should I use monthly or annual figures?

Use one consistent period for every amount and rate in the relationship. If a form specifies an annual rate or a monthly amount, follow that label rather than mixing time periods.

Does the result include fees and tax?

Only the costs and taxes represented by the inputs and formula are included. A real transaction can include other charges, so compare the estimate with the underlying agreement or statement.

9

Sources & References