Web Winder Website Calculators: Free Calculators: Mortgage Refinancing Calculator

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Installation Instructions: Mortgage Refinancing Calculator

Terms of Use: You may install this Mortgage Refinancing Calculator on your site for free, so long as my copyright info remains embedded in the code and the link back to my website is visible on the page you install the calculator on. You will find a link to the installation page located just beneath the calculator on this page.
If you would like to purchase a license for the latest commercial grade (professional) version of this calculator, please visit our Commercial Calculator Center.
If you would simply like to use an upgraded version of this calculator for your own personal use, I invite you to try our ever-growing collection of consumer-oriented calculators on our free online calculator use website for consumer decision making, discovery, and learning.

Below are the instructions for installing the Mortgage Refinancing Calculator on your website:

Step #1: Select and copy the script from the following text box, then paste between the <HEAD> and </HEAD> tags of the page you are installing the calculator on.

//DO NOT REMOVE THIS COPYWRITE INFO!
//Mortgage Refinancing Calculator
//By Daniel C. Peterson
//Web Winder Website Services, 1997-2024  All Rights Reserved.
//Distribution, editing or reselling of this script is strictyly prohibited
//without expressed written permission from Daniel C. Peterson.
//For commercial grade (professional) versions of this and many other
//calculators, visit http://www.webwinder.com.

function computeForm(form) {

var pmt1 = form.payment.value;

var prin1 = form.principal.value;

var intPort1 = 0;

var prinPort1 = 0;

var accumInt1 = 0;

var accumPrin1 = 0;

var i1 = form.intRate.value;

if (i1 > 1.0) {

i1 = i1 / 100.0;

form.intRate.value = i1;

}

var i1  = i1  / 12;

var i2 = form.intRate2.value;

if (i2 > 1.0) {

i2 = i2 / 100.0;

form.intRate2.value = i2;

}

var i2  = i2  / 12;

var count1 = 0;

while(prin1 > 0) {

intPort1 = prin1 * i1;

prinPort1 = pmt1 - intPort1;

prin1 = prin1 - prinPort1;

accumPrin1 = accumPrin1 + prinPort1;

accumInt1 = accumInt1 + intPort1;

count1 = count1 + 1;

if(count1 > 600) {break; } else {continue; }

}

form.origInt.value = "$" + parseInt(accumInt1,10);

var pow = 1;

for (var j = 0; j < form.nper2.value *12; j++)

pow = pow * (1 + i2);

var fpayment2 = (form.principal.value * pow * i2) / (pow - 1);

form.payment2.value = "$" + parseInt(fpayment2,10) + "." + parseInt(fpayment2 % 1 * 100,10);

var fmoSave = form.payment.value - fpayment2;

form.moSave.value = "$" + parseInt(fmoSave,10) + "." + parseInt(fmoSave % 1 *100,10);
		
		var ftotInt2 = (fpayment2 * form.nper2.value *12)
    - form.principal.value;

form.totInt2.value = "$" + parseInt(ftotInt2,10);

var fintSave = accumInt1 - ftotInt2;

form.intSave.value = "$" + parseInt(fintSave,10);

form.closeMo.value = parseInt(form.closingCost.value / fmoSave,10);

var fnetSave = fintSave - form.closingCost.value;

form.netSave.value = "$" + parseInt(fnetSave,10);

form.summary.value = "If you refinance your current " + parseInt(form.intRate.value *100,10) + "." + parseInt(form.intRate.value *100 % 1 *100,10) + "% mortgage to a " + parseInt(form.intRate2.value *100,10) + "." + parseInt(form.intRate2.value *100 % 1 *100,10) + "% mortgage, your monthly payment will drop by " + form.moSave.value + " and you will save " + form.intSave.value + " in interest charges over the life of the mortgage.  However, in order for this refinancing to yield any savings at all you will need to stay in your current home for at least " + form.closeMo.value + " months.  That's how long it will take for your monthly payment savings to offset the closing costs attributable to refinancing.";
		
}

function clearForm(form)

{

form.principal.value = "";
    form.payment.value = "";
    form.intRate.value = "";
    form.intRate2.value = "";
    form.nper2.value = "";
    form.closingCost.value = "";
    form.payment2.value = "";
    form.moSave.value = "";
    form.closeMo.value = "";
    form.intSave.value = "";
    form.origInt.value = "";
    form.netSave.value = "";
    form.totInt2.value = "";
    form.summary.value = "";

}

</script>

Step #2: Select and copy the following HTML form code, then paste in the desired location between the <BODY> and </BODY> tags of the page you are installing the calculator on.

<form method="post">
<table BORDER="1" CELLSPACING="0" CELLPADDING="4">

<tr>
<td align="center" COLSPAN="2">
<font face='arial'><big><strong>Mortgage Refinancing Calculator</strong></big></font>
</td>
</tr>

<tr>
<td COLSPAN="2">
<font face='arial'><small>This JavaScript calculator will help you to
decide whether or not you should refinance your current mortgage at a lower interest rate.
Not only will this calculator calculate the monthly payment and net interest savings, but
it will also calculate how many months it will take to break even on the closing costs.</small></font>

</td>
</tr>

<tr>
<td><font face='arial'><small>Enter the principal balance of your mortgage:</small></font><br><font face='tahoma,arial'><small><small>(call your mortgage lender and ask
for the current payoff amount)</small></small></font></td>
<td><input TYPE="text" NAME="principal" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>Enter the amount of your monthly mortgage payment:</small></font><br><font face='tahoma,arial'><small><small>(principal and interest portion only)</small></small></font></td>
<td><input TYPE="text" NAME="payment" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>Enter the your mortgage's current interest rate:</small></font></td>
<td><input TYPE="text" NAME="intRate" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>Enter interest rate you will be refinancing at:</small></font></td>
<td><input TYPE="text" NAME="intRate2" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>Enter the number of years you will be refinancing for:</small></font></td>
<td><input TYPE="text" NAME="nper2" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>Enter the closing costs that will be required for refinancing:</small></font></td>
<td><input TYPE="text" NAME="closingCost" SIZE="15"></td>
</tr>
<tr>
<td colspan="2" align="center"><input TYPE="button" VALUE="Compute" onClick="computeForm(this.form)"> <input TYPE="reset" VALUE="Reset" onClick="clearForm(this.form)"></td>
</tr>
<tr>
<td><font face='arial'><small>This is how much your monthly payment will be if you refinance:</small></font></td>
<td><input TYPE="text" NAME="payment2" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>Monthly Savings:</small></font></td>
<td><input TYPE="text" NAME="moSave" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>Number of months to break even on closing costs:</small></font></td>
<td><input TYPE="text" NAME="closeMo" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>This is how much interest you will pay under your current monthly payment plan:</small></font></td>
<td><input TYPE="text" NAME="origInt" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>This is how much interest you will pay under your refinanced monthly payment plan:</small></font></td>
<td><input TYPE="text" NAME="totInt2" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>This is how much interest you will save if you refinance:</small></font></td>
<td><input TYPE="text" NAME="intSave" SIZE="15"></td>
</tr>
<tr>
<td><font face='arial'><small>Net Refinancing Savings (interest savings less closing costs):</small></font></td>
<td><input TYPE="text" NAME="netSave" SIZE="15"></td>
</tr>
<tr>
<td align="center" COLSPAN="2"><textarea COLS="60" ROWS="6" name="summary" wrap="virtual"></textarea></td>
</tr>

<tr>
<td align="center" COLSPAN="2"><font face='tahoma,arial'><small><small>Copyright © 1997-2024<i> <a href='http://www.webwinder.com'>Web Winder Site Traffic Magnets</a></i>. All rights reserved.</small></small></font></td>
</tr>
</table>
</form>

Step #3: Edit the form HTML to match the look and feel of your site, then save and upload the page to your server and you're done!

**Please note that we do not provide support or installation help for the free versions of our calculators. We do provide support and installation help for our professional versions.

Home > Free Site Traffic Magnets > Free Calculators > Mortgage Refinancing Calculator Installation

Contact: Dan Peterson
P.O. Box 11
Bemidji, MN 56619
(218) 243-2263