1st Calculator

Expression calculator and converter with skins and lots of features

1st Calculator  Review

Handy and useful expression calculator and unit converter with skins. Main features: fully customizable interface with skins; keyboard shortcuts; all arithmetic operations, more than 20 functions; editable lists of constants and unit conversions; recalling previously used expressions; five result formats with changeable precision; automatic clipboard copy/paste; minimizes to the system tray.