Compound Interest Calculator

Calculate compound interest on your investments or savings with our free online tool. See how your money can grow over time thanks to the power of compounding.

Initial Investment (VND or $)

Annual Interest Rate (%)

Investment Period (Years)

Compounding Frequency

Result

Total Amount —

Principal —

Total Interest —

What is Compound Interest?

Compound interest is interest calculated on the initial principal and also on the accumulated interest from previous periods.

Unlike simple interest, compound interest grows exponentially over time — your money earns interest, and that interest also earns interest.

Formula: A = P(1 + r/n)^nt
Where:
P = principal, r = annual rate,
n = compounding frequency per year,
t = time in years.

Tips

Start early: Even small amounts can grow significantly over decades.
Higher compounding frequency = faster growth.
Reinvest dividends or interest to maximize compounding.