Compound Interest Calculator
We can use the law of 72 to calculate the time required for the principal to double.
The 12% return doubles in six years with 72/12 = 6 => compounding.
Check out the effect of magically increasing the principal.
Total Profit
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Resulting Amount
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FAQ
How do I use the compound interest calculator?
Enter initial amount, return rate, and investment period to see the final amount and total profit calculated with compound interest.
What is the Rule of 72?
The Rule of 72 is an easy way to calculate the period for investment principal to double. Divide 72 by the annual return rate to get the approximate period.
What's the difference between compound and simple interest?
Simple interest only applies to principal, but compound interest applies to interest as well, causing exponential growth over time.