Compound Interest Calculator

See how your money grows over time with compound interest

Initial Investment ($)

Monthly Contribution ($)

Annual Interest Rate (%)

Time Period (years)

Compounding Frequency

Currency

Results

Future Value

Total Interest

Total Deposits

Year-by-Year Breakdown

Year	Deposits	Interest	Balance

How Compound Interest Works

Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. The formula is: A = P(1 + r/n)^(nt) where P is principal, r is annual rate, n is compounding frequency, and t is time in years. With regular contributions, compound interest creates exponential growth — the earlier you start, the more powerful the effect.