Compound Interest Calculator
See how savings grow with compound interest and regular monthly contributions.
How it works
Your starting amount grows at the annual rate, compounded at the frequency you pick. Monthly contributions are added at the end of each month and earn interest from then on. Returns are not guaranteed.
Formula
A = P(1 + r/n)^(nt) + PMT × ((1 + i)^(12t) − 1) ÷ i, where i = (1 + r/n)^(n/12) − 1
Example
$10,000 at 5% compounded monthly for 10 years grows to $16,470.09.
FAQ
What is compound interest?
Interest earned on both your original money and on interest already added.
Are taxes and inflation included?
No. Both reduce real returns.
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Related guides
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