The Metric system is very user-unfriendly, even though it is easy to do math with it; the traditional measures are more oriented to the human scale.

For example: Centigrade temperatures (that's what they called it when I went to school, who knows where they came up with this Celsius crap?) use too large a degree differential to relate to common life -- should you wear a sweater when it's 12 degrees C and should you take it off when it reaches 24? Damned if I know. The Fahrenheit scale pretty much covers the normal weather conditions between 0 (damn cold) and 100 (damn hot) that we live under, and the difference between 59 and 68 is immediately perceptible to your mind, without your having to sense it physically (whereas with 15 and 20 Celsius you would have to take your shirt off to know what it meant).

So here is a handy conversion table! Enter something in the left-hand box, then click outside the box, and the result will appear on the right. (Note: you can save this HTML and run it on your desktop by right mouse-clicking it and filing it in your Accessories folder or some convenient place.)

Some of the conversion code was shamelessly stolen from Alan Simpson's web page at
http://www.coolnerds.com/jscript/alanconv.htm
-- Grobius would have been at a loss trying to figure out the arithmetic involved.