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Investment Compound Interest Calculator

This calculator requires the use of Javascript enabled and capable browsers. This script calculates the projected value of a savings plan, based on a compound interest calculation. Enter the dollar amount invested, the current principal, using just numbers and the decimal. Next, enter the amount you plan to add to that principal each year. Enter the number of years you anticipate allowing the investment to build, in decimal and AT LEAST 1 year (not .5, but 1.5 is OK). Next, enter the published interest rate you expect to earn on that investment. Finally, enter the number of times the interest compounds annually; virtually all options are allowed (with the exception of fractional days), though they may be illogical. There are several possible "daily" options, since institutions differ on what they term as daily. (For example, annually (1), monthly (12), quarterly (4), bi-annually (2), daily (360), daily (365) or daily (366), but no decimal days such as 365.25.) Click on the Calculate button and the future value at projected maturity will be returned. You may click on Clear Values to do another calculation. This gives a very close estimate to the future value of an investment, based on the controlled factors. Factors such as when you make annual contributions cannot be anticipated.

Required Data Entry
Current Principal $
Annual Contribution Addition $
Years To Build    
Interest Rate     %
Annual Interest Compounding     X

Calculated Results
Projected Savings Value $
Updated 8.15.11

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