The best replacement for calc is excel.

The best alternatives to calc are rated as following:
★★★★★  excel
★★  microsoft excel
★★  gnumeric
★★  calc
★  stats
★  stat
★  trig
★  ap stats
★  statistics
★  ap stat
  college algebra
  bc calc
  ap calc
  microsoft office excel
  ms excel

Your alternative for calc is not listed? Suggest!
Speaking about calc, one probably shouldn't forget about trig.

Other search terms related to calc and their ratings are:
★★★★★ trig
You have in mind a companion for calc and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of calc in all years. Click on graph for more.
calc
excel
microsoft excel