John J. Xenakis Xenakis Consulting Services Inc.

John J. Xenakis
100 Memorial Drive Apt 8-13A
Cambridge, MA 02142
Phone: 617-864-0010
E-mail: john@jxenakis.com

Mortgage Scripts (Javascript)

I developed these mortgage calculators for a client. The heart of the logic is in the mathematical algorithms, written in Javascript.

With these calculators, you can quickly estimate your potential monthly payment, determine how much income you need to qualify, create a mortgage amortization schedule, and much more. Each calculator has an easy-to-understand set of instructions.

To use a calculator, click on the appropriate link below. To return to this page from a calculator page, click on your browser's "back" button.


Amortization Schedule: Estimate monthly principal and interest payments and mortgage balances for the term of your home loan.

APR: (Annual Percentage Rate) Calculate the actual APR for a loan, taking into account closing costs, points, and the quoted interest rate for the loan.

Effects of Prepayment: Calculate the effects of paying additional monthly principal against your loan.

Income Requirement: Calculate the income required to qualify for the home of your dreams.

Loan Length: Compare the amount of time it will take to pay off your loan with various monthly payment amounts.

Mortgage Payment: Calculate a monthly mortgage payment.

Payment Table: Compare the monthly mortgage payment for a range of interest rates and principal amounts.

How Much House Can You Afford: This is an unusual calculator that lets you figure out how much you can afford to spend on a house.

Quick Mortgage Computations: Perform various mortgage computations, get quick results.


Copyright © 1986-2014 by John J. Xenakis