This function estimates the size of individual, equal, end-of-period payments required to achieve a given future worth at the end of the last period.

Sinking funds can be set up to cover costs that will arise in the future.  For example this calculator estimates the amount of money that has to be set aside in each period (year) to cover an identified cost such as equipment replacement.

The inputs for this form are numbers only as follows:

Interest rate is expressed as a decimal, thus 10% is 10/100 = 0.1 and 4.75% is 4.75/100 and input as 0.0475;

Number of periods is the number of separate periods over which the interest rate applies, usually a period is one year;

Desired future worth is the final sum desired is the amount accumulated.