Gas Cost Calculator

Allen Liu Apr 30, 2007

General

Do you ever wonder how much you pay for gas in a year? Use this simple gas cost calculator to find out how much you spend monthly and annually. In addition, this calculator will also compute the miles per gallon (MPG) for your vehicle.

Notes

Created by: Allen Liu
Web Site: http://www.gobozzy.com

Source Code

Paste this source code into the designated areas.

External file

Paste this code into an external JavaScript file named: gasCostCalculator.js

/* This script and many more are available free online at
The JavaScript Source!! http://www.javascriptsource.com
Created by: Allen Liu | http://www.gobozzy.com */
function calculate_mpg_savings(gasform) {
  var dailymiles = gasform.dailymiles.value;
  var costpergallon = gasform.costpergallon.value;
  var daysperfillup = gasform.daysperfillup.value;
  var sizeoftank = gasform.gastanksize.value;
  var mpg = Math.round(((daysperfillup/sizeoftank) * (dailymiles)) *100)/100;
  var monthlycost = Math.round((1/mpg) * costpergallon * (dailymiles * 30.417) * 100)/100;

  document.gasform.mpg.value = mpg;
  document.gasform.monthlycost.value = "$" + monthlycost;
  document.gasform.yearlycost.value = "$" + Math.round(monthlycost * 12 * 100)/100;
}

Head

Paste this code into the HEAD section of your HTML document.


<script type="text/javascript" src="gasCostCalculator.js"></script>

Body

Paste this code into the BODY section of your HTML document


<form name="gasform" class="gascalc">
<fieldset style="width: 350px;">
<legend><strong>Gas Cost Calculator</strong></legend>
<table>
<tr>
<td width="225"><label class="labl" for="dailymiles">Daily Mileage</label></td>
<td><input type="text" size="5" style="text-align: right;" id="dailymiles"></td>
</tr><tr>
<td><label class="labl" for="gastanksize">Gas Tank Size in Gallons</label></td>
<td><input type="text" size="5" style="text-align: right;" id="gastanksize"></td>
</tr><tr>
<td><label class="labl" for="daysperfillup">Days Between Fillups</label></td>
<td><input type="text" size="5" style="text-align: right;" id="daysperfillup"></td>
</tr><tr>
<td><label class="labl" for="costpergallon">Cost per Gallon (<em>in Dollars</em>)</label></td>
<td><input type="text" size="5" style="text-align: right;" id="costpergallon"></td>
</tr><tr>
<td><input name="calculate" value="Submit" onclick="calculate_mpg_savings(gasform)" type="button">
    
<input name="Reset" class="button" type="reset"></td>
</tr>
</table>
</fieldset>
<br>
<fieldset style="width: 350px;">
<legend><strong>My Gas Cost</strong></legend>
<table>
<tr>
<td width="225"><label class="labl" for="mpg">MPG </label></td>
<td><input type="text" size="10" style="text-align: right;" id="mpg" readonly="readonly"></td>
</tr><tr>
<td><label class="labl" for="monthlycost">Monthly Gas Cost </label></td>
<td><input type="text" size="10" style="text-align: right;" id="monthlycost" readonly="readonly"></td>
</tr><tr>
<td><label class="labl" for="yearlycost">Annual Gas Cost </label></td>
<td><input type="text" size="10" style="text-align: right;" id="yearlycost" readonly="readonly"></td>
</tr>
</table>
</fieldset>
</form>

Leave a Response

(1 comment)

Thanks for making the script available.[br /]It will help people budget their gas monies & budgets.

robert harrold May 8, 2007

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