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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 1.1.0:
  • Fixed wrong computation optimization leading to wrong results when inverting matrices with fractions that were inverse of integers.
  • Fixed regression where dynamic variables may not be automaticallay updated properly.
  • Fixed 0! to return 1 (by mathematical convention).
  • Added Gamma and Zeta functions.
  • Added preference to select how the next input is


  • OS X 10.9 or later

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Chalk User Discussion

4 1


Current Version (1.x)


Downloads 1,149
Version Downloads 102
License Free
Date 17 Nov 2017
Platform Intel 64 / OS X
Price Free
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