this post was submitted on 21 May 2025
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I don't think there are many things to help, really, except for memorizing some basic stuff.
Like, learn how large is 10 cm and you can derive pretty much any usual length from that. 1 meter? Ten times ten cm. And so on. For larger distance units I recommend using a GPS navigation and set the units to metric. When the GPS tells you "in 200 hundred meters turn right" you'll slowly associate a real distance with that number. And as before, the math is easy: 1 km is 5 times 200 meters.
Same with everything, find something where you can associate something you know (how large is that that cup of soda I'm drinking) with a number (it's 200 ml). Afterwards it's really easy to calculate because that's what metric was made for. So, if you memorize that your cup has 200 ml, one liter is easy - it's 5 times that.
For temperature, you'll have to memorize some important numbers. 0° water freezes, 100° it boils, human body 36.6° (or 36.5° for ease of remembering, the difference is not that important), comfortably warm room temperature is 20°, 25° it gets rather hot, though still manageable, 30°C gets uncomfortable, 35° is really hot, 40° is hell. Remembering in increments of 5° helps, eventually you'll get a feel for 22° being somewhere between 20 and 25 and what exactly that translates to.