I'm from Australia and we don't use pounds so I've modified the 4chan/fit/ lbs;kgs extension with some help from another forums to convert everything when you mouse over. It's very handy.

I have no idea where to put this thread, but this forum is where I use it the most..

You just put this in a text file;

// @name Tnation lbs;kgs

// @namespace unit_conversion

// @description Converts between metric and customary units on 4chan.

// @include http://tnation.T-Nation.com/free_online_forum/*

// ==/UserScript==

(function ()

{

var posts = document.getElementsByTagName('blockquote');

var linkReg = /(?\/a>|http:.?( |$))/gm;

var regExp = /((.\d|\d)[,.'\d]*[\d]|(.\d|\d))/gm;

var foundMatch = null;

var linkRanges;

var i = 0;

function convertNumbers(fullText) {

if (foundMatch = regExp.exec(fullText)) {

checkLinks(fullText);

var isLink = false;

if (linkRanges.length > 0) {

for (var i=0; i if (foundMatch.index > linkRanges[i][0] && foundMatch.index < linkRanges[i][1]) {

isLink = true;

regExp.lastIndex = linkRanges[i][1];

break;

};

};

};

if (!isLink) {

if (!(foundMatch.index > 0 && fullText.substr(foundMatch.index-1,1).match(/[a-wyzA-WYZ$â?¬]/))) {

if (!(fullText.length > regExp.lastIndex && fullText.substr(regExp.lastIndex,1).match(/[%$â?¬]/))) {

if (fullText.length > regExp.lastIndex && fullText.substr(regExp.lastIndex,6).match(/(kg|lb|kilo|

pound|cm|inch|['"])/) && fullText.substr(regExp.lastIndex,2).match(/( *[klpci]|['"].*)/)) {

var numType = fullText.substr(regExp.lastIndex,2).replace(' ','');

} else {

var numType = '';

};

var tempReplace = foundMatch[0];

if (foundMatch.index > 0 && fullText.substr(foundMatch.index-1,1).match(/./)) {tempReplace =

tempReplace.replace(/^./,'')};

var replacement = replaceText(tempReplace, numType);

fullText = fullText.substr(0,foundMatch.index) + fullText.substr(foundMatch.index).replace

(tempReplace, replacement);

regExp.lastIndex = foundMatch.index + replacement.length;

};

};

};

fullText = convertNumbers(fullText);

};

return fullText;

};

function replaceText(matchText, numType) {

var newText = ' var numSplit = [];

if (cleanNumber.match(/'/)) {

numSplit = cleanNumber.split("'");

if (numSplit.length > 2) {return matchText};

numSplit[0] = Number(numSplit[0]);

numSplit[1] = Number(numSplit[1]);

numType = 'i';

} else {

cleanNumber = Number(cleanNumber);

};

```
switch (numType.charAt(0)){
case 'k':
newText += Math.round(cleanNumber * 2.2 * 100) / 100 + ' lb';
break;
case 'l':
case 'p':
newText += Math.round(cleanNumber / 2.2 * 100) / 100 + ' kg';
break;
case 'c':
if (cleanNumber > 30.48) {
newText += Math.floor(cleanNumber / 2.54 / 12) + "'" + Math.round(cleanNumber / 2.54 % 12) + "''";
} else {
newText += Math.round(cleanNumber / 2.54 * 100) / 100 + ' in';
};
break;
case '"':
case "'":
case 'i':
if (numSplit.length == 2) {
newText += Math.round((numSplit[0] * 2.54 * 12 + numSplit[1] * 2.54) * 100) / 100 + ' cm';
} else {
if (numType.match(/('[^']|^'$)/)) {
newText += Math.round(cleanNumber * 2.54 * 12 * 100) / 100 + ' cm';
} else {
newText += Math.round(cleanNumber * 2.54 * 100) / 100 + ' cm';
};
};
break;
default:
newText += Math.round(cleanNumber / 2.2 * 100) / 100 + ' kg / ' + Math.round(cleanNumber * 2.2 * 100) / 100 + '
```

lb';

};

```
newText += '">' + matchText + '</span>';
return newText;
```

};

function checkLinks(checkText) {

linkRanges = [];

var i = 0;

var newMatch = null;

```
while (newMatch = linkReg.exec(checkText)) {
linkRanges[i] = new Array(newMatch.index, linkReg.lastIndex);
i++;
};
```

};

})();

And chance the extension in the file name to ".js" then drag it into chrome and let it install.