Compound Interest Calculator

yrs
%

Your numbers stay private: they are processed locally in your browser and never sent to a server.

What Is Compound Interest?

Compound interest is the interest earned on both the principal of an investment (the initial amount invested) and the accumulated interest from previous periods. For example, here is how $1,000 will grow over 2 years when invested in a savings account earning a 3% annual interest rate and compounding quarterly:

How to Calculate Compound Interest?

Generalizing the above example leads to the formula:

where F is the final amount, I is the initial amount, R is the yearly interest rate, C is the number of times compounding occurs in a year, and T is the time to grow the investment in years.

Tips and Tricks

Related Tools