Javascript mortgage calculator free code samples

1 Stop Mortgage Calculator - Calculate your Mortgage payments in Seconds!
Monthly mortgage calculator

Use anyone of these 4 monthly mortgage calculators.
Many periodic mortgage payment calculations can be used.

Bi-weekly mortgage payments vs Monthly mortgage payments calculator
US mortgage calculatorCanadian mortgage calculator
Canadian & US mortgage comparison calculator

Monthly mortgage calculator


When you are looking for a mortgage, you basically are looking to borrow some money. The twist here, is that your house or your property is what warranties the loan. Therefore, when you calculate your mortgage with a monthly mortgage calculator, you are calculating how much you can borrow on your house (or the house you wish to buy)!


Mortgage amount or principal

The total dollar amount of money you have to borrow for your mortgage.
You will need this number for the automatic calculations done with the monthly mortgage calculator.


Interest rate

The interest rate on the mortgage. It is calculated in different ways, but the most common one is monthly. You will also need this number in order to use the monthly mortgage calculator.


Mortgage amortization

The number of years over which you would repay your mortgage loan if you made your normal monthly payments. The most common terms for mortgages are 15 years, 25 years and 30 years. You will need this third number as input for this monthly mortgage calculator.


Mortgage term

In Canada, this is the number of years your mortgage contract lasts. For Canadians, the mortgage term is different from the mortgage amortization. They will usually have a 25 year amortization period, but the mortgage contract is renegotiable after 1, 2, 3 or 5 years.


Monthly mortgage calculator

A monthly mortgage calculator simply calculates your mortgage payments
by taking into account that you will do 12 equal payments per year, for the term of the loan. A mortgage payment calculator like anyone of the four mentionned at the top of this page, will let you calculate everything.


Javascript mortgage calculations

Javascript mortgage calculations are done with the Javascript language. To do the calculations, a JavaScript mortgage script is used. The Javascript mortgage script is usually placed in the head section of the web page. It's simply a javascript function that computes the required answer based on the user's input.

The general mortgage formula used to calculate mortgage payments is:
PAYMENT = PRINCIPAL x INTEREST / (1 – (1 + INTEREST)–PERIOD). Click here for more information on the javascript mortgage formula or the javascript mortgage code use in a javascript mortgage script.



Click here for the monthly mortgage calculator page.


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