Compound Interest Calculator
See how money grows with compounding over time.
Inputs
Result
Future Value
$300,850.72
After 20 years
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Formula
FV = P × (1 + r/m)^(m·t) + C × ((1 + r/m)^(m·t) − 1) / (r/m), where P is the principal, C is the per-period contribution, r is the annual rate, m is the compounding frequency, and t is the number of years.
How it works
A compound interest calculator projects the future value of an investment that earns interest on its principal and on previously earned interest, optionally with regular contributions.
Example
Example: $10,000 invested at 7% with $500/month contributions for 20 years, compounded monthly, grows to roughly $300,850.72. Of that, $130,000 is contributions and about $170,850.72 is interest earned.
Frequently Asked Questions
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