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Chalk is a calculator that tries to do right what others do wrong. It wants to prove that a "basic" software calculator can be as handy as a real desktop calculator (it's a shame that computers are still so bad as calculators). An non-exhaustive list of features is:

  • Pretty print
  • Complex, quaternions, matrices
  • Arbitrary long integer and floats
  • Uncertainty
  • Primes, basic arithmetic
  • Bit manipulation
  • Grapher with predicates

What's New

Version 1.3.0:
  • Fixed bit inspector regression some float number interpretations;
  • improved detection of exact display of floating point number values;
  • improved parser to allow more characters for "degree" symbol;
  • added MathML export in the equation generator;
  • Greek localization;
  • updated third-party libraries.


  • OS X 10.9 or later

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Chalk User Discussion

4.8 3


Current Version (1.x)


Downloads 1,821
Version Downloads 82
License Shareware
Date 06 Mar 2018
Platform Intel 64 / OS X
Price Free
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