42 votes

Qalculate! - the ultimate desktop calculator

11 comments

  1. saturnV
    Link
    Qalculate has so many god-damn features! It has a full symbolic calculator suite (integration, differentiation, simul equations), can convert between currencies and units, do calculations with...

    Qalculate has so many god-damn features! It has a full symbolic calculator suite (integration, differentiation, simul equations), can convert between currencies and units, do calculations with units, has a dataset containing the planets in the solar system, has interval arithmetic for error propagation in physics calculations, arbitrary precision calculations, plotting using gnuplot, non-integer bases, and more! This is with the choice of a CLI or a GUI.
    some simple examples here

    17 votes
  2. [2]
    rosvall
    Link
    The command line version has been my go-to calculator for the last 15 years. It’s absolutely brilliant at just handling units and SI-prefixes without any fuss or weird syntax.

    The command line version has been my go-to calculator for the last 15 years. It’s absolutely brilliant at just handling units and SI-prefixes without any fuss or weird syntax.

    8 votes
    1. tauon
      Link Parent
      Same. I recently spent some time abroad and this: qalc 750dkk to € is by far the fastest way to convert between currencies, especially since I’ll already have a terminal window open anyways.

      Same. I recently spent some time abroad and this:

      qalc 750dkk to €

      is by far the fastest way to convert between currencies, especially since I’ll already have a terminal window open anyways.

      4 votes
  3. Apos
    Link
    I've been using SpeedCrunch. Looks like similar projects.

    I've been using SpeedCrunch. Looks like similar projects.

    6 votes
  4. [2]
    tibpoe
    Link
    Here's a web version of Qalculate for use on your phone, or on other peoples' computers: https://flaviutamas.com/qalculate-wasm/

    Here's a web version of Qalculate for use on your phone, or on other peoples' computers: https://flaviutamas.com/qalculate-wasm/

    6 votes
    1. saturnV
      Link Parent
      Another web based version is https://qalculator.xyz/ (slightly nicer UI, can do currency)

      Another web based version is https://qalculator.xyz/ (slightly nicer UI, can do currency)

      6 votes
  5. Akir
    Link
    It's impossible for this to be the ultimate desktop calculator when the HP-42 already exists. Seriously, though, I find myself liking Xcas, which coincidentally is what HP uses in their latest...

    It's impossible for this to be the ultimate desktop calculator when the HP-42 already exists.

    Seriously, though, I find myself liking Xcas, which coincidentally is what HP uses in their latest graphing calculators. It does everything and runs on anything, even potatoes.

    5 votes
  6. vord
    Link
    I've been really liking Calculator++ on Android. Not nearly as advanced as this, but a significant upgrade over the defaults.

    I've been really liking Calculator++ on Android. Not nearly as advanced as this, but a significant upgrade over the defaults.

    4 votes
  7. saturnV
    Link
    A few other web based calculators: kalk Numbat (selling point is nice error messages, more of a programming language, but can be used as a simple calculator with physical units and constants)...

    A few other web based calculators:
    kalk
    Numbat (selling point is nice error messages, more of a programming language, but can be used as a simple calculator with physical units and constants)
    Spigot is a streaming infinite precision calculator which can generate more digits on demand
    and just for fun: https://archive.org/details/calculatordrawer (a bunch of HP and TI emulated calculators)

    4 votes
  8. Bwerf
    Link
    I usually press f12 in any browser window and type my math as JavaScript, doesn't work on Mobile unfortunately.

    I usually press f12 in any browser window and type my math as JavaScript, doesn't work on Mobile unfortunately.

    2 votes
  9. whbboyd
    Link
    Interesting. My go-to "desk" (read: terminal) calculator is units (AFAICT basically everyone uses the GNU version, though strictly speaking it was part of Unix and there are others), which in...

    Interesting.

    My go-to "desk" (read: terminal) calculator is units (AFAICT basically everyone uses the GNU version, though strictly speaking it was part of Unix and there are others), which in addition to the headline unit conversion features can do number crunching in line with a decent scientific calculator. Units can basically just do intro-level physics classes, and it turns out most of the stuff people do with calculators actually does have units attached; if nothing else, Units can check that you didn't do anything wildly inconsistent with them.

    There's a regrettably abandoned but essentially equivalent Android port/clone, which is nice.

    I keep pari/gp installed on my computers for when I need heavier mathematical lifting or programmability, but pull it out so rarely that I'm very rusty with it.

    1 vote