Compounding Interest Calculator

- The Eighth Wonder of the World

Compound interest is the eighth wonder of the world. He who understands it, earns it … he who doesn’t … pays it. - Albert Einstein

Use this free continuous compound interest calculator. See how much your money might grow in a simple yet effective way. Plus line chart & every year's sum.


Don't know what a realistic compound rate would be? Don't worry, check here for past year returns.

Compounding Interest: The Secret to Growing Your Wealth Over Time

Have you ever heard of compounding interest? It's a super helpful tool for growing your wealth over time. Basically, it works like this: when you earn interest on an investment, that interest gets reinvested.

That means you start earning interest on not just your original investment, but also on the interest you've already accumulated.

If you start with just a dollar and double it every day for 30 days, you'll end up with about $30 to spend on whatever you'd like.

But if you let that dollar compound for a full 30 days, you'll have over a billion dollars at your disposal!

Can you even imagine all the things you could buy with that kind of money? The possibilities are endless!

Can you see how this can lead to some major growth over time? It's all about starting to invest early and consistently adding to your investments.

By understanding compounding interest and incorporating it into your investment strategy, you can set yourself up for financial success.

Compound Interest Formula

Starting Capital * (1 + Interest/100)Years

Future Value of an Annuity Formula

(Monthly Contribution * 12) * ((1 + Interest/100)Years-1)/(Interest/100)

This Calculator Formula

Compound Interest Formula + Future Value of an Annuity Formula

Starting Capital * (1 + Interest/100)Years + (Monthly Contribution * 12) * ((1 + Interest/100)Years-1)/(Interest/100)

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