Compound Interest Calculator

The Compound Interest Calculator below can be used to compare or convert the interest rates of different compounding periods, such as converting a monthly APR into an equivalent annual APY.
Modify the values and click the Calculate button to use
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Interest can be compounded at different frequencies — annually, semi-annually, quarterly, monthly, daily, or continuously. A nominal rate compounded more frequently produces a higher effective annual return than the same nominal rate compounded less frequently.

This calculator converts a rate at one compounding frequency into the equivalent rate at another, using the Effective Annual Rate (EAR) as the common comparison point. For example, 6% compounded monthly is equivalent to about 6.17% compounded annually.

Frequently Asked Questions

It compares or converts interest rates of different compounding periods, such as converting a monthly APR into an equivalent annual APY.

Interest can be compounded annually, semi-annually, quarterly, monthly, daily, or continuously.

A nominal rate compounded more frequently produces a higher effective annual return than the same nominal rate compounded less frequently.

The EAR is the common comparison point this calculator uses to convert a rate at one compounding frequency into the equivalent rate at another.

For example, 6% compounded monthly is equivalent to about 6.17% compounded annually.

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