Compound Interest Calculator
Enter Your Details
Enter a valid principal amount (0 or more).
%
Enter a valid rate (0-100).
years
Enter years between 1 and 50.
$
Added at the end of each month, on top of your principal.
Your Results
Enter your investment details, then tap Calculate Growth to see how your money grows.
Total Contributions
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Total Interest
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Interest % of Total
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Time Period
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How compound interest calculator works
A compound interest calculator estimates how your money grows when interest is earned on both the principal and the interest already added. It uses your starting amount, interest rate, compounding frequency and time period.
Limitations of the calculator
- Assumes a fixed rate for the whole period
- Does not account for taxes or fees
- Ignores inflation’s effect on real returns
- Not accurate for irregular deposits or withdrawals