Compound Interest Calculator

See the power of compounding over time.

Initial deposit ($)

Monthly contribution ($)

Annual rate (%)

Years

Compounds / year

Future value

$144,572.72

After 20 years

Total contributed

$58,000.00

Interest earned

$86,572.72

How this calculator works

FV = P(1 + r/n)^(nt) + PMT · ((1+i)^(nt) − 1)/i

Combines the future value of a lump sum with the future value of a monthly contribution series.

$10,000 with $200/month at 7% for 20 years grows to roughly $137,000.