I don't know about thread pitch.<br/><br/>In fact, the real difficulty is that industry refuses to spend the money to re-tool.<br/><br/>In the UK we were forced to by European legislation.<br/><br/>So, that 3m length of two-be-four? it's actually 3000x100x50. In my line of work, we do freely convert. 4" is 100mm. 5" is 125, 6" is 150, 7" is 175, 8" is 200, 9" is 225, 10" is 250, 11" is 275 and 12" is 300mm.<br/><br/>It's not accurate, but it's close enough 25mm per inch is actually an easy approximation. It's actually 25.4.<br/><br/>Celcius is a hell of a lot easier to remember. Water freezes at 0°C and boils at 100°C. What could be simpler? And to convert, double it and add 30 for a simple approximation or multiply by 9/5 and add 32 for the exact conversion.<br/><br/>Weights:<br/><br/>Two and a quarter pounds of jam,<br/>Weigh about a kilogram.<br/><br/>It's actually<em>slightly</em>over 2.2 Lb per Kg.<br/><br/>It's volumes I have trouble with and lets face it, you guys use a non-standard gallon! A gallon is 8 pints and a pint is 20 fluid ounces. Litres to Gallons.... 3.78 Litres to a US Gallon, and 4.54 to an Imperial gallon<br/><br/><div class="quoteheader"><div class="topslice_quote"><a href="https://elliquiy.com/forums/index.php?topic=148593.msg7740109#msg7740109">Quote from: Blinkin on 17-02-2013, 22:52:34</a></div></div><blockquote class="bbc_standard_quote">Sadly, I remember when gasoline was just 60 cents a gallon. I've never paid less than 89 cents a gallon, but that seems so unbelievable when it's around $3.50+ a gallon... Admittedly, that less than a dolar a liter, but you're still spending far too much to fill the tank.<br/></blockquote><div class="quotefooter"><div class="botslice_quote"></div></div><br/>Wow, that's CHEAP! we payaround $8.00 US per US Gallon. £1.35 per litre.<br/><br/><div class="quoteheader"><div class="topslice_quote">Quote</div></div><blockquote class="bbc_standard_quote">As I said, I don't have a problem with the metric system, and it is taught in schools... it's just not really reenforced in the real world. If you asked someone for 35 ounces of water, they'll look at you like you're crazy... "I want the liter diet coke." is understandable. lol</blockquote><div class="quotefooter"><div class="botslice_quote"></div></div><br/>Milk is sold by the pint, still, in the UK, but we aren't allowed to say it's a pint. It's 568mL.<br/><br/><div class="quoteheader"><div class="topslice_quote">Quote</div></div><blockquote class="bbc_standard_quote">On a side note that no one really wants to know, when I had my kidney transplant, I found out exactly how much my bladder holds and I shocked the nurses..! They thought that I was rigging the output somehow and couldn't figure out how I could produce so much.<br/></blockquote><div class="quotefooter"><div class="botslice_quote"></div></div><br/>Um, TMI?<br/><br/>I'm tempted to ask how much, but I really don't want to know!