Understanding Compound Interest Interactively

Compound interest is the eighth wonder of the world. He who understands it, earns it; he who doesn't, pays it. But reading about it can be dry. Let's look at the numbers.

Here is an interactive calculator to help you understand how your money grows over time. Play around with the values below!

As you can see from the interactive widget above, even small changes in the interest rate or the number of years can have a massive impact on your final balance.

Why this matters

By breaking up the text with an interactive component, we reduce cognitive load. You don't have to imagine the numbers—you can feel them by tweaking the inputs yourself.