• Mac@mander.xyz
    link
    fedilink
    English
    arrow-up
    13
    arrow-down
    2
    ·
    3 days ago

    1kg = double it and add a little lb
    1lb = just under half kg

    1cm = just under half in
    1in = a little more than double cm

    F vs C = give up

    • twopi@lemmy.ca
      link
      fedilink
      English
      arrow-up
      2
      ·
      1 day ago

      1 kg = 2 * lb + 1/5 * lb (lucky for us 5 is a prime factor of base 10)

    • Grabthar@lemmy.world
      link
      fedilink
      arrow-up
      2
      ·
      2 days ago

      For above freezing, terrestrial temperatures, Canadians have long depended on the “double it and add 30” rule to understand freedom temperature units while travelling.

    • lime!@feddit.nu
      link
      fedilink
      English
      arrow-up
      5
      ·
      3 days ago

      C to F = 100 is too hot, 0 is too cold, 50 is just righ- ah damn it

    • teft@piefed.social
      link
      fedilink
      English
      arrow-up
      4
      ·
      3 days ago

      F vs c is easier if you think in bands of temps. 15 C is about 60 F. Each ten degrees difference in F is about 5 degrees different in C. So 20 C is about 70 F. 10 C is about 50 F.

    • Onomatopoeia@lemmy.cafe
      link
      fedilink
      English
      arrow-up
      3
      ·
      3 days ago

      For F and C, there’s a 10% variation from double/divide (5/9 vs 9/5).

      So add or subtract 10% after doing that part.

      • Mac@mander.xyz
        link
        fedilink
        English
        arrow-up
        1
        ·
        2 days ago

        I’ve worked in some capacity of manufacturing for a while now so I’ve gotten used to going back and forth. You’ll get it!
        Practice by thinking what the other would be any time someone mentions one.