Compound Interest Calculator

Compound interest means that the interest you earn each year is added to your principal, so that the balance doesn't merely grow, it grows at an increasing rate. Click here to read more about interest rates.

Compound Interest Calculator


Current Principal ($):
Calculation Period:
Interest Rate (%):
Regular Monthly ($):
Make additions at start end of each compounding period.


Future value ($):
Compound Interest ($):

Compound Interest Formula

A = P × (1 + r)t


A = the future value of the investment/loan, including interest
P = the principal investment amount (the initial deposit or loan amount)
r = the annual interest rate (decimal = %/100)
t = the number of periods (years, months, ...) the money is invested or borrowed for


While every effort is made to ensure the accuracy of the information provided on this website, we offer no warranties in relation to these informations.