The How Much to Save Calculator solves for the regular investment amount required to reach some future sum. Enter your goal (future value). Then enter the number of periods for which you plan to make the regular payment (180 total periods with payment frequency set to monthly equals 15 years). Set the payment and compounding frequency. Enter the expected annual return (annual interest rate).
This calculator is most often used to answer questions such as "how much do I have to save to be a millionaire in 20 years?"
Enter 1,000,000.00 for the future value. Assuming that you want to save on a quarterly basis, enter 80 for the total periods (80 payments/deposits made 4 times a year is 20 years). Set the payment frequency to Quarterly. Set the compounding frequency to your assumed compounding frequency. Finally set the assumed rate of return, say 8.5%.
For the above example, if compounding is set to quarterly, then the investor will have to invest $4,854.57 every quarter for 80 quarters to reach $1,000,000.00.
You can use this quick and easy calculator to calculate what the regular, periodic savings amount (periodic payment) would be to reach some future amount (FV). The "years to double" is the time it takes an investment to double in value at the "annual rate" you entered. This is a basic financial planning tool.
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Time Value of Money