Compound Interest Calculator
Calculate investment growth with compound interest
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The Power of Compound Interest
What is Compound Interest?
Compound interest is interest calculated on the initial principal and also on the accumulated interest from previous periods. It's often called "interest on interest" and will make your money grow faster than simple interest.
The Rule of 72
A quick way to estimate how long it will take for your money to double: divide 72 by your annual interest rate. For example, at 7% annual return, your money will double in approximately 10.3 years (72 ÷ 7 = 10.3).
Time is Your Friend
The earlier you start investing, the more time your money has to grow. Even small monthly contributions can grow into significant wealth over decades thanks to compound interest.