1st Calculator

About

1st Calculator is an expression calculator and unit converter which allows you to directly enter an expression to be evaluated. It is a handy and nice skinnable replacement for the standard Windows calculator with many additional features.

The current version of 1st Calculator is 1.15. You can download 1st Calculator and the additional skins for it, and register the program if you like it and wish to use after the evaluation period.

Screen Shots

Features

Fully customizable interface with skins support
Can be called by pressing just one button
All arithmetic operations and over 20 functions
Editable lists of constants and unit conversions
Recalling previously calculated expressions
Five result formats with changeable precision
Automatic clipboard copy/paste
Minimizes to the system tray

News

Version 1.15 - June 28, 2001
Quick calculation mode
Improved docking
Some other improvements and bugfixes

Version 1.14 - February 28, 2001
Pop-up hints with error messages
New pop-up menu of the expression field
Some small improvements