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AJ PHP Software Source Code Financial Library
Future Worth
Single Payment Compound Amount Factor

number future_worth_SPCAF ( number, number, number)


future_worth_SPCAF returns the future value given present worth, interest rate and number or periods.

future value

Source Code:

function future_worth_SPCAF ($present_worth, $interest_rate, $number_of_years)
//variable and initializations
$the_result = 0.0;
$SPCAF = 0.0;

//calculate future value with the
//single payment compound amount factor
$SPCAF = pow(1.0 + $interest_rate, $number_of_years);
$the_result = $present_worth * $SPCAF;

//return the value
return $the_result;


include ("ajfinancial.php");

$present_value = 100.00; //100 dollars
$interest_rate = 0.06; //6 percent interest
$years = 2; //2 years

$future_value = future_worth_SPCAF($present_value, $interest_rate, $years);

echo "present value = $present_value<br>";
echo "interest rate = $interest_rate<br>";
echo "years = $years<br>";
echo "future value = $future_value<br>";

Run Example

percent interest rate percent interest rate
simple interest simple interest
future worth SPCAF future worth
single payment compound amount factor
present worth SPPWF present worth
sing payment present worth factor

References - Books:
Leland T. Blank and Anthony J. Tarquin.r. 1989. Engineering Economy. McGraw-Hill, Inc.
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