terça-feira, agosto 11, 2020
Início Marcenaria Metric or Imperial Measurements: Does it matter in the workshop?

Metric or Imperial Measurements: Does it matter in the workshop?

FREE PLANS for The BASIC MOBILE WORKBENCH ▻▻ http://basicmobileworkbench.com/ In this video I discuss metric and imperial (U.S.) measurements in …



  1. We don`t use the decimeter because we do have an intermediate thing that we use in a similar way you guys use a foot. Half a meter. Also, noone ever uses millimeters in real life. Noone will ever tell you that a desk is 1738mm long unless it`s a technical specification. It`s 1.7m long. Also millimeters do not all have the same length lines…as you can see in your video 🙂 You get a longer mark every 5mm. And yes…we do use inches in Europe. For example all pipes and fittings, wheels, monitors.

    For lumber buying. We buy it by the cubic meter (423.776 bf). Standard thicknesses are 25mm (27mm-30mm actual thickness) and 50mm (52mm-55mm actual thickness). Basically it`s 1inch and 2 inches. Then above that you usually get 80mm but tose are super rare. Standard lengths are 3m (usually 3.1-3.2) and 4 meters.

    Calculating boards is super simple. Lets say you want to buy a walnut board that is 32cm by 3m by 2.5cm. Walnut costs 1500e/m3. You convert everything into meters. So the calculation goes like this:

    0.32x3x0.025×1500 = 36E

    EZ mode 🙂

  2. My dad's workshop has some very old tools that are in imperial measurements. Yet I grew up in everything being taught in Metric.
    My dad has a rather large poster hanging on the shed wall that is just conversions from Imperial to metric ( He has had this chart before google was a thing)that has helped in many occasions.
    My biggest problem with imperial measurements is that there isn't a standard for them. I have to check if its a US gallon, or a UK gallon. Where as in Metric, an Australian Litre is the same as a Litre in Zimbabwe or Germany.
    As for shop work and buying stock. It costs far too much to import wood from overseas, so everything is metric in the stores. I have a basic idea of a conversion from just repeating the same measurement conversions over and over.

  3. I live in england and still use both depending in what I'm doing, however metric is more accurate so when making things I would use that.
    Here are a few things I still use imperial measurements for my hight, my weight, how far i travel, a pint of beer or milk (milk is sold in liters I just refer to it as pints still)
    Funny thing is I'm 33 so metric has been in use all my life. It's not that often I convert between the two I just tend to pick the measurement system easiest to use at the time.
    I guess I use imperial because of my parents referring to almost all measurements that way.

    Maybe seeing how the UK population have been so reluctant in some areas to change over to metric and are left using both is one reason the U.S.A has not made the change.

  4. In the UK when ordering lumber or just talking about stuff casually I tend to find people using imperial. Example, I built a 6ft tall fence using 4 by 4 posts, 2 by 4 rails and 4 by 1+1/4 inch boards. When doing the actual construction however I would always use metric, setting posts 18 hundred mil apart, (1.8 meter) etc

  5. You need lto come to the UK which is in the middle of the two systems. We measure distance between towns in miles use mph for speed, our height is in feet and our weight is in stone but our gym weights are kg, veggies and meat is bought in both kg and pounds which gets confusing with £, golf is in yards while athletics is meters, only real time you see decimeter is when calculating volume in science class dm3. Many people feel it's an age thing but I know many children which do find themselves between the two systems. We may only speak one language but you'll find us fluent in both and weight distance units. 🙂

  6. Australia converted to metric way back when I was in school but I never really caught on. These days I use both – my height is in feet but my weight is in kilos – like you for running its kilometers but when woodworking or anything similar its feet and inches. If something is in centimeters I have to convert it to feet and inches other wise I cannot picture it. I'm always mixing and matching the two depending on the situation but measuring lengths has to always be in feet and inches otherwise I get all muddled up and make too many errors

  7. I’m sure it’s already been pointed out but with metric there is also a different sized line at the 5mm mark or 0.5cm. So to get to 8mm you don’t have to count 8 just got to the 5 and count 3.

    I like your idea about inches being divided into 10ths too. One thing with metric that makes it all easier to picture in your head is the 0s. It’s a huge part of base 10. So 1750mm is 1m 70cm 5cm. You can cut it so many ways to suit the average distance that’s relevant. It could be 1.75m is 1 3/4m or 100cm + 75cm.
    This way there’s not actually a huge gap between 1cm and 1m. You could split it 1cm 10cm 50cm 100cm or even add in 25cm and 75cm if you feel the need.
    Like you said how you can easily gauge km in your head if you work with metric long enough you can basically gauge any distance and be able to split it up super quickly and accurately.
    It’s also fun for trivial things like turning 1000km into cm or m for sense of scale. I wish the lightyear was base 10. Damn you light why couldn’t you just travel at 10×10 to the power of 10 kilometres per year in a vacuum.

    One thing I’ve noticed with Americans so familiar with the imperial system is for someone not mathematically inclined, simple things like 15% of 1000 can seem incredibly complex to them. I guess cause they’re used to dividing in fractions.
    Even if the whole world converted to metric, imperial still wouldn’t ever die out. Drugs are far too popular and they bring both units of measurement together. Every American rockstar knows how much 1g 10g 100g of cocaine looks like and how long it’ll last. Every aussie pot smoker knows what an ounce or a pound of it looks like too. See, drugs educate our population more than some teachers I know.

  8. I'm used to metric system for my entire life until I moved to the US…it took me a year to get use to estimating measurements like what you're referring into 1ft and maybe a mile…for metric system, we use 1 meter as the general measurement for estimating a distance while here in the US we use ft. The closest measurement you can come up for both is 1ft = 300mm or .3m. Like when I was in school of Architecture, the standard kitchen counter height is 900mm or .9m as here in the US is 3ft. The standard outlet height is 300mm or .3m or 1ft in the US. So the bottom line is, just adjust to whatever is in front of you. No need to complain or argue about it. It's like learning two language. But for sure I'll be having problems again when I go back to working in metric…lol

  9. As a Mechanic working with machinery that originates in USA (Imp.) and has Japanese engines (Si), and a few older that have UK fittings (Ww), it gets pretty challenging to make sure you have the right size spanner to hand. (Imp. = Inches/Feet), (Si = Millimeter/Metres), (Ww = Whitworth Inches/Feet). Chuckle.

  10. In Uk we use both but depends on age a bit and purpose. We use miles on the road but measure smaller objects usually metric CM or MM. fence erectors and any older guys tend to use feet and inches. I weigh myself in stone and lbs. it’s a bit of a mess for me personally and I’m equally confused by both.

  11. He totally failed to think in terms of converting metric measurements in 10ths…
    1 metre is the same as 100 centimetres, 0.1 decimetre, 1000 millimetres and so on…
    The "Imperial" brain seems to be formatted in such a way that it seems a bit difficult for the mere mortal "imperial" formatted woodworker to simplify. 😉

  12. this is an odd one for me, being from England we use metric as a main unit of measurement, how ever where i find it gets odd is in the uk we use miles and in the us u use km. km is metric being 1000 meters, yet my height is measured in feet and inches not mm's or cm's and my weight is in stones, pounds and ounces but we cook in kg and grams. we use both feet and meters as a unit of distance and volume but when it comes to tools and builds we use metric because its easier to plan stuff out in whole numbers. yet if i was going to get decking for my garden it probably would get measured in sq feet as its an measurement of volume / area not length of what its taking up but would be built in meters and so. for me the biggest issue i have with using imperial is the whole tool sizes i find had to work or quickly. but thats just me

  13. Fun fact, metric units are now based on natural phenomena, e.g. the speed of light is used for length, radioactive decay for time. Off of these measurements are then based imperial measurements. Much of a muchness really, except for space exploration. Can get expensive fast when you confuse systems there!


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