Compound Interest Calculator

Estimate how money can grow with compound interest over time.

Final Balance
Total Interest
Growth

Free Compound Interest Calculator

Use this compound interest calculator to estimate how an initial amount can grow when interest is added back to the balance over time. Enter the starting amount, annual interest rate, number of years and compounding frequency.

How compound interest is calculated

The calculator uses the standard compound interest formula A = P(1 + r/n)^(nt), where P is the initial amount, r is the annual rate, n is the number of compounding periods per year and t is the number of years.

Compounding frequency

You can calculate annual, semiannual, quarterly, monthly or daily compounding. The result shows the estimated final balance, total interest earned and percentage growth.

Note: Results are estimates for informational purposes and do not include taxes, fees, inflation or changing interest rates.