The present value of a certain amount of the future money is how much money we need to invest today in order to get return of that amount of money in the future. Normally the investment today will receive the investment return plus capital in the future. Therefore the present value of money is less than the amount of the future money if the interest rate is positive.
CubicPower provides a calculator to calculate the present value of the future money.
We only need to input the interest rate and the periods, then click the SEND button. The returned value is how much is the present value of one dollar in the future.