Swiss File Knife
a command line
free external tools,
- download the free Swiss File Knife Base from Sourceforge. - open the Windows CMD command line, Mac OS X Terminal or Linux shell. - OS X : type mv sfk-mac-i686.exe sfk and chmod +x sfk then ./sfk - Linux: type mv sfk-linux.exe sfk and chmod +x sfk then ./sfk OS X and Linux syntax may differ, check the help within the tool.
sfk calc "1+2*3" do a simple calculation with mathematical operators + - * / options -dig[its]=n round result to n digits -form also print the formula, tab separated after result chaining support can use chain input data as #text within formula. web reference http://stahlworks.com/sfk-calc examples sfk calc "1.0+2.5*3.5" prints 9.75. quotes "" are required with linux but not under windows. sfk echo "1+2*3" +calc "#text*4" calculates 1 + 2*3*4 = 25 sfk echo "1+2*3" +calc "#text" +calc "#text*4" calculates (1+2*3) * 4 = 28 sfk filt in.txt +calc "#text" -form calculate all formulas given in in.txt sfk list -size -tabform sfk.exe +filt -utabform "#col1" +calc "#text/1000" -dig=0 show the size of sfk.exe in kbytes, rounded to zero digits after decimal point. 
sfk is a free open-source tool, running instantly without installation efforts. no DLL's,
no registry changes - just get sfk.exe from the zip package and use it (binaries for
windows, linux and mac are included).
read more about all sfk functions here.