5 ms·

you might want to try units(1). https://www.gnu.org/software/units/units.html https://www.gnu.org/software/units/units.html the input language is less flexibl

by 5- 5y ago

you might want to try units(1). https://www.gnu.org/software/units/units.html https://www.gnu.org/software/units/units.html the input language is less flexible than wolframalpha/google, but i quickly got used to it. it's nice to have something local and reliable. you can also define custom units. i prefer using it in terse mode: $ units -t 0.03$/hr*1month 21.914532 US$ $ units -t 10TB/month Mbps 30.421214

Siira 5y ago
Julia is also excellent for working with units (Units.jl, IIRC).
- ChrisRackauckas 5y ago
  Unitful.jl
avmich 5y ago
For calculator problems like that, I use J: */ 0.03 24 30 21.6 1e6 %~ (10e12 * 8) % */ 30 24 3600 30.8642 Usually requires some massaging, but still takes seconds.
- kragen 5y ago
  While APL dialects are very nice for this sort of thing, they generally don't understand units of measure or know about physical constants; you have to put those into them yourself. Here are some of my recent units(1) queries: 141 pounds force 30 mm # in joules 1160/4 log(3)/3/(log(2)/2) # how much more efficient is one-hot ternary than one-hot binary? 5V 7 μs / 7.3 A .0117% half avogadro mol / 1.251e9 years / (potassium+chlorine)g # how radioactive is lite salt? 3.27$/gallon # in $/liter sqrt(2 2000 electronvolt/electronmass) 18.8 foot pounds force # in joules 163$/(7.9 g/cc * 1500 mm 3000 mm 3.2 mm) # cold rolled steel price is higher than steel sold by weight m3/4 / 15 cfh 2 pi sqrt(200 um / gravity)
every 5y ago
Units advises there are 118.20896 smoots per furlong..
- artursapek 5y ago
  people still measuring in smoots smh
- sokoloff 5y ago
  Wouldn’t that be properly expressed as 118 Smoots plus 5 Ears?
nimih 5y ago
qalc[1] is also quite nice if you're looking for a command line calculator; it handles units well, but has some other fancy features, and has a very lax parser which i find to be a huge plus. $ qalc '0.03$/hr*1month' error: "r" is not a valid variable/function/unit. (0.03 × (USD / hour)) × (1 × month) = $21.915 $ qalc '0.03$/h*1month -> CAD' (0.03 × (USD / hour)) × (1 × month) ≈ CAD 27.28388011 $ qalc '10TB/month -> Mbit/s' 10 × (terabyte / month) ≈ 30.42056430 megabits/s $ qalc 'integrate(x+x^2)' integrate(x + (x^2)) = x^3 / 3 + x^2 / 2 + C [1] https://qalculate.github.io/manual/qalc.html https://qalculate.github.io/manual/qalc.html

by 5- 5y ago

Siira 5y ago

Julia is also excellent for working with units (Units.jl, IIRC).

ChrisRackauckas 5y ago
Unitful.jl

avmich 5y ago

For calculator problems like that, I use J: */ 0.03 24 30 21.6 1e6 %~ (10e12 * 8) % */ 30 24 3600 30.8642 Usually requires some massaging, but still takes seconds.

kragen 5y ago
While APL dialects are very nice for this sort of thing, they generally don't understand units of measure or know about physical constants; you have to put those into them yourself. Here are some of my recent units(1) queries: 141 pounds force 30 mm # in joules 1160/4 log(3)/3/(log(2)/2) # how much more efficient is one-hot ternary than one-hot binary? 5V 7 μs / 7.3 A .0117% half avogadro mol / 1.251e9 years / (potassium+chlorine)g # how radioactive is lite salt? 3.27$/gallon # in $/liter sqrt(2 2000 electronvolt/electronmass) 18.8 foot pounds force # in joules 163$/(7.9 g/cc * 1500 mm 3000 mm 3.2 mm) # cold rolled steel price is higher than steel sold by weight m3/4 / 15 cfh 2 pi sqrt(200 um / gravity)

every 5y ago

Units advises there are 118.20896 smoots per furlong..

artursapek 5y ago
people still measuring in smoots smh
sokoloff 5y ago
Wouldn’t that be properly expressed as 118 Smoots plus 5 Ears?

nimih 5y ago

qalc[1] is also quite nice if you're looking for a command line calculator; it handles units well, but has some other fancy features, and has a very lax parser which i find to be a huge plus. $ qalc '0.03$/hr*1month' error: "r" is not a valid variable/function/unit. (0.03 × (USD / hour)) × (1 × month) = $21.915 $ qalc '0.03$/h*1month -> CAD' (0.03 × (USD / hour)) × (1 × month) ≈ CAD 27.28388011 $ qalc '10TB/month -> Mbit/s' 10 × (terabyte / month) ≈ 30.42056430 megabits/s $ qalc 'integrate(x+x^2)' integrate(x + (x^2)) = x^3 / 3 + x^2 / 2 + C [1] https://qalculate.github.io/manual/qalc.html https://qalculate.github.io/manual/qalc.html