In Windows 7 Microsoft has finally decided to revamp the built-in calculator so that it’s a bit more useful for people. There is, however, already a free super powerful calculator available to all Windows, Mac, and Linux users. It’s called SpeedCrunch.

SpeedCrunch is unique because of it’s extensive set of features. It has a slew of built-in functions such as sine and cosine, and will try to automatically complete the functions as you type them. What’s really nice though is the long scrolling history so that you can go back and see a calculation you performed a little bit earlier in the day.

Here’s a more extensive list of its features:

  • Scrollable display
  • Up to 50 decimal precisions to ensure fewer rounding errors
  • Unlimited variable storage
  • Intelligent automatic completion
  • Full keyboard-friendly with keyboard shortcuts to speed up tasks
  • More than 50 built-in maths function including abs, sqrt, pi, log, exp, ln, sin, cos, tan, sinh, cosh, tanh, asin, acos, atan, arsinh, arcosh, and artanh
  • Optional keypad
  • On-the-fly calculation
  • Customizable appearance
  • Syntax highlight, with parentheses matching
  • History of last expressions
  • A special variable ‘ans’ holds the last calculation result
  • Angle mode: Alt+D for degrees, Alt+R for radians
  • Inside an immediate tooltip, calculate the result of the selected text
  • Save and restore sessions
  • Dock windows serving as a browsable mathematics manual, with geometry figures, quadratic equation etc

You can always grab the portable version if you end up falling in love with SpeedCrunch so much so that you want to carry it in your pocket.

Get SpeedCrunch for Windows, Mac, or Linux [via LinuxLinks]