SIMPLE INTEREST CALCULATOR
1. Enter the initial investment amount*
$
2. Enter the annual interest rate*
%
3. Enter the total number of years*
Growth Over Time
The gray base is your starting balance. The brand-blue band on top is interest earned — it grows by the same dollar amount every year, which is what makes simple interest a straight line. The dashed gray line shows what the same money would have done with annual compounding instead. The gap between them is what compounding buys you.
Fill in Initial Investment, Interest Rate, and Number of Years to see the growth chart.