Compound Interest Calculator
Compound interest adds interest on interest. More frequent compounding grows a balance slightly faster at the same nominal rate. This tool does not add extra monthly deposits — it grows a single starting amount.
Future value20,096.61
Interest earned10,096.61
Illustration only. Markets and taxes vary.
Formula
A = P (1 + r/n)^(n t).
How to use this calculator
- Enter starting amount, rate, and years.
- Choose compounding frequency.
- Read future value and interest.
Examples
$10,000 at 7% for 10 years monthly
Grows to about $20,097.
FAQ
Can I add monthly deposits?+
This version is lump-sum only. Future value of an annuity is a different formula.
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