The Compounding Interest Calculator
Compounding Interest with Monthly Deposits
For Instructions, see below

1) How much money is currently in the account? $
2) What is the APY of the account (e.g. 6.04%)? %
3) How much money do you plan on depositing at the beginning of each month? $
4) How many years will you continue to deposit this amount? Year(s)

5) Do you want to display the total amount of the account after each month?
No- Just display final value.
Yes- Show the total each month.