Compound Interest

See how your money grows over time with principal, rate, and compounding frequency

FV = P × (1 + r/n)^(n×t)

Future value

2,009.66

Total interest earned

1,009.66

Total growth

+100.97%

About this calculator

The Compound Interest Calculator shows how your money grows over time when interest is reinvested. Unlike simple interest, compound interest earns returns on your returns — the longer you invest, the faster your balance grows. Enter your principal, rate, compounding frequency, and time to see your investment's future value.

Common examples

$1,000 at 5% annually for 10 years → future value $1,628.89, interest earned $628.89
$5,000 at 7% compounded monthly for 20 years → future value $20,097.11, interest $15,097.11
$10,000 at 3% compounded daily for 5 years → future value $11,618.22, interest $1,618.22
$500 at 10% compounded quarterly for 30 years → future value $8,935.05, total growth 1,687%
$100,000 at 4% semi-annually for 15 years → future value $181,136.16, interest $81,136.16