Compound Interest Calculator
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Investment Tool

Watch your money
compound over time

Model the long-term growth of any investment using the power of compounding interest. Adjust inputs below to see results instantly.

Parameters
$
Starting principal amount
$
Amount added each period (0 = no contributions)
%
0% 10% 20% 30%
Expected annual return percentage
1 yr 17 yrs 33 yrs 50 yrs
Investment time horizon
Future Value
$ 215,892.50
+$115,892.50 gain (115.89%)
Principal
$100,000
Interest Earned
$115,892.50
Total Contributions
$0.00
No. of Contributions
0
Rule of 72 ?Divide 72 by the annual rate to estimate how many years it takes to double your investment.
~9 yrs
Multiplier ?How many times larger your final value is compared to your initial investment.
2.16×
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