Effective Annual Rate Calculator

Convert nominal rates into an annual basis that is easier to compare.

Nominal annual rate (%)

Periods per year

Annual fee or cost (%)

Why the effective rate matters

Nominal rates can hide the true cost of an operation. The effective annual rate shows the real impact when compounding and additional costs are involved.

Rates that look similar can produce very different results when compounding periods differ.
Costs and fees should be part of the calculation to approximate the real cost.
Comparing only the nominal rate can lead to poor decisions in borrowing or investing.

Practical tip: When comparing offers, always analyze the effective annual rate rather than just the headline rate.