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Use this practical script to easily convert between the 7 most popular length units- centimeters, meters, kilometers, miles, inches, feet and yards. Simply enter a number, and let the script display the desired equivalents. Cool.

Label: Length Converter script

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<script type="text/javascript">

// Length Converter script- By Bruce Zhang

var factors1 = new Array(1, 0.01, 0.00001, 0.00000621, 0.3937, 0.0328, 0.01094);
var factors2 = new Array(100, 1, 0.001, 0.000621, 39.37, 3.28,  1.094);
var factors3 = new Array(100000, 1000, 1, 0.621, 39370, 3280, 1094);
var factors4 = new Array(160934, 1609.34, 1.60934, 1, 63360, 5280,1760);
var factors5 = new Array(2.54, 0.0254, 0.0000254, 0.0000158, 1, 0.08333, 0.02778);
var factors6 = new Array(30.48, 0.3048, 0.0003048, 0.0001896, 12, 1, 0.3333);
var factors7 = new Array(91.44, 0.9144, 0.0009144, 0.0005688, 36, 3, 1);
var factors = new Array(factors1,factors2,factors3,factors4,factors5,factors6,factors7);

function convert_unit()
{
	from_index = document.length_con.from_unit.selectedIndex;
	to_index = document.length_con.to_unit.selectedIndex;
	factor = factors[from_index][to_index];
	document.getElementById("formula").innerHTML = document.length_con.from_unit.options[document.length_con.from_unit.selectedIndex].text + " = " + factor + " " + document.length_con.to_unit.options[document.length_con.to_unit.selectedIndex].text;
	if(isNaN(document.length_con.from_value.value))
		document.getElementById("to_value").innerHTML = "Not a valid number.";
	else
		document.getElementById("to_value").innerHTML = factor * document.length_con.from_value.value;
}
</script>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->

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<form name="length_con">
<table>
	<tr>
		<td>From </td>

		<td>
			<select name=from_unit onChange="convert_unit()";>
			<option> centimeters
			<option> meters
			<option> kilometers
			<option> miles
			<option> inches
			<option> feet
			<option> yards
			</select>

		</td>
		<td>  To </td>
		<td>
			<select name=to_unit onChange="convert_unit()";>
			<option> centimeters
			<option> meters
			<option> kilometers
			<option> miles
			<option> inches
			<option> feet
			<option> yards
			</select>

		</td>
	</tr>
	<tr>
		<td> </td><td colspan="3"><div id="formula">centimeters = 1 centimeters</div></td>
	</tr>
	<tr>
		<td colspan="4"> </td>

	</tr>
	<tr>
		<td>Enter </td>
		<td><input type="text" name="from_value" value="1" size="12" maxlength="12"></td>
		<td> <input type=button value="To" onClick="convert_unit()";> </td>
		<td><div id="to_value">1</div></td>
	</tr>

</table>
</form>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->