Did you know?

  • A0 ≈ 1 m²
  • This aspect ratio of √2:1 is unique because folding it in half preserves the same ratio.
  • In 1786, Georg Christoph Lichtenberg, a German scientist and philosopher, proposed the idea.
  • The modern standard was first proposed by Dr. Walter Porstmann in Germany in 1922.
  • The US, Canada and Mexico still primarily use US Letter and other stupid papers sizes.
  • I stole that pic from r/sciencememes

by Zamzamazawarma

26 comments

  1. As usual I expect hordes of Hansen to come at me with corrected fakts.

  2. To my fellow germans in this sub it is the DIN 476

  5. My favourite paper size is actually B5. Halfway between A5 and A4

  7. Gotta admit, the Germans are based for providing us with this gift.

  8. That’s what I imagine the inside of a German’s brain looks like

  9. truly a masterpiece, sometimes we need to streamline the small things in life…

  11. Much appreciated this standard!
    I wish that was applied to all furniture too.

  13. Printing a buddy’s flight pass on A0 is the best prank ever. Thanks Germany for making it possible

  14. European superiority. Hans making neat things with Pierre measurements.

  16. See what you can accomplish Hans when you use your autism for good?

  17. TIL the number stands for the number of folds, what the hell!

  20. Those sizes were introduced in France in 1789, Germans just wanted to put hard rules on them with the standard in 1922.

    (But first written about in 1786 by a german)

  23. Its perfection on paper, Hans. You are a bunch of brilliant people. Just dont be bossy with the rest of the world and everything will be ok.

  24. A nice corollary is that an A4 sheet of 80g/m² is 5g and a 500 -sheet pack is 2.5kg. When you need makeshift weight units…

  25. And the series of their sum asymptotically converges to its limit 2A0, as demonstrated by the image, perfection.

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