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Mortgage Calculator

Amount borrowed $  
Interest rate %  
Months to pay  
Monthly payment $  
Total interest paid $  
Extra principal $  
Months to pay  
Total interest paid $  
The Mortgage Calculator is a Java Script calculator that computes the size of a monthly payment for a given loan duration and totals interest paid. It also computes the effects of paying extra principal.

To operate the calculator, first enter the amount borrowed, the annual interest rate, and the duration in months. Press the Compute button to get the principal and interest portions of a mortgage payment as well as a total of the interest to be paid for the duration of the loan. Press the Listing button to generate the principal and interest portions of each monthly payment.

Extra principal payments reduce the duration of the mortgage and the total interest to be paid. Enter the value of extra principal to be paid each month; press Compute to see the effect on duration and total interest. Listing generates a list of the principal and interest portions of each monthly payment with extra principal included.

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Tammac Credit Services
275 Mundy Street, Suite 202
Wilkes-Barre, PA 18702
570.821.7380
800.326.9243
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Do not duplicate or redistribute in any form.
Tammac Credit Services