`SPPW = (1 + "i" %)^- "n" `

Enter a value for all fields

The Single Payment Present Worth (SPPW) calculator computes the Single Payment Present Worth factor based on the interest rate and number of cash flow periods.

INSTRUCTIONS: Enter the following:

• i% - interest rate entered as a percentage; i.e., enter 4.7 for a 4.7% interest rate
• n - number of cash flow periods

Single Payment Present Worth (SPPW):  The calculator returns the SPPW factor as a real number.

The Math / Science

 The formula for Single Payment Present Worth is:

     SSPW =(1+i)^-n

where:

• SPPW is the Single Payment Present Worth factor
• i is the interest rate
• n is the number of cash flow periods.

This equation solves for the single payment present worth factor.  The single-payment present-worth factor, SPPWF,  is the reciprocal of the single-payment compound amount factor.  

This equation uses the discount rate, i, and the number of payments to calculate the discount factor which will return present value of a future worth.  symbol:  (P/F,i%,n)

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Present and Future Worth Calculators

• (SPCA) Single Payment Compound Amount Factor
• (USSF) Uniform Series Sinking Fund Factor 
• (SPPW) Single Payment Present Worth Factor
• (UGFW) Uniform Gradient Future Worth Factor 
• (UGPW) Uniform Gradient Present Worth Factor 
• (UGUS) Uniform Gradient Uniform Series Factor 
• (USCA) Uniform Series Compound Amount Factor 
• (USPW) Uniform Series Present Worth Factor 

REFERENCE

• Lindeburg, Michael R (1992). Engineer In Training Reference Manual. Professional Publication, Inc. 8th Edition.