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

Write down what you initially want to invest, and how much more you will contribute annually. Then write down the interest rate you think you will earn annually. Remember to put down how many years you might do this for. For the compounding percentage, you can keep it at 100% if you plan on reinvesting your earnings. Change these numbers around to get a good idea of how compounding interest works.

Investment Compounding Calculator

Invested amount : Your initial investment
Annual Contribution: Optional
Interest rate: % Return on investment (Interest)
Number of years:
Compounding percentage: % reinvested profits
Check out a video on compound interest
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