Forex Compound Interest Calculator Use this calculator to determine how much money you can make by compounding your forex wealth. Starting Capital: Monthly Deposit: Interest Rate (APY): Length Of Investment (years): Compound Frequency: Daily Weekly Monthly Quarterly Yearly Calculate Your Investment Totals × Total Capital: Total Profit: Close Directions for use Step 1: Enter the initial amount of money that you would like to invest or deposit. Step 2: Enter the amount of money that you are likely to deposit into the investment on a monthly basis. Step 3: Enter the annual interest rate that you expect to receive on your investment during an average calendar year. Step 4: Enter the number of years that you expect to leave your investment in the account without any withdrawals. Step 5: Select the frequency that you expect your interest to be calculated e.g. a bank account typically compounds interest on a daily basis. Step 6: Hit CALCULATE and watch your money grow!