Compound interest

Leave money alone and it starts to grow on its own. Drag the sliders and watch.

Try changing these

Starting amount$1,000

Yearly rate5%

Years30

$4,322

You put in $1,000. Time and interest added $3,322.

An illustration of the math, not a prediction of what any real account will earn.

Time beats amount

Sam saves a little, starting young, and leaves it for 40 years. Riley saves twice as much each year but starts late, with only 20 years. They both put in the same $48,000. Sam ends with $239,562. Riley ends with $98,389. Sam’s extra time, not extra money, put them $141,173 ahead.

Not financial advice. These are illustrations of how the math works, not a prediction of what any real account will earn. No one can promise a return.

Not financial advice. This shows how a concept works, not what to do with your money. The numbers here are illustrative arithmetic, not a prediction of what any account will earn. No one can promise a return.

Assumes interest compounds once a year. Real accounts and investments vary.

Nothing you enter here is saved or sent anywhere. It stays on your device.

Made by AI.

Back to Learn