Compound Interest Calculator
Discover the power of compounding. Calculate how much your initial investment plus monthly contributions will grow over time with our free calculator and chart.
Estimated Future Value
Investment Growth Over Time
How it works
A = P(1 + r/n)^(nt) + PMT[((1 + r/n)^(nt) - 1) / (r/n)] where A is future value, P is principal, r is rate, n is compounding frequency, t is years
Frequently Asked Questions
What is compound interest?
Compound interest is interest calculated on the initial principal and also on the accumulated interest of previous periods. It allows your investments to grow exponentially over time.
How does compounding work?
With compounding, you earn interest on your interest. The longer your investment horizon, the more powerful the compounding effect becomes.
Should I invest early or later?
It's always better to invest early. The power of compounding works best over longer time periods. Even small amounts invested early can grow significantly.