**Precise Calculator** is a free open source scientific calculator for Windows.

- arbitrary precision (from 1 to 9999999)
- complex numbers
- fractions
- lists, vectors, matrices
- history (shortcuts ctrl+up, ctrl+down)
- calculator can write all results to a log file
- commands if, goto, print, return
- unlimited number of variables
- frequently used formulas can be saved as macros
- calculator can be translated to other languages

If you like the Precise Calculator, maybe you should try other freeware programs too: Sokoban, Solitaire, Gomoku game, triangular Mines, Color Sudoku, Tiny Player, HotkeyP. You can find them on my homepage.