Rules and More Rules
Online: Four Function Calc
MetaCalc
MetaCalc is a great online, four-function calculator. The calculator can be enlarged from its normal size to provide a very large display. The calculator has the Order of Operations programmed in.
eCalc: Online Basic Calculator
The eCalc online basic calculator is a great four-function calculator. The calculator keys are color-coded by function. Additional keys include an Exponent and Inverse key.
CLIPS Calculator
The CLIPS Calculator is a multifunction online calculator. It can serve as a four-function, scientific, graphing, or conversion calculator. Colored buttons give the user the ability to change the color theme for the calculator. The creators also offer the option to download the SWF (Flash) file for offline use. This file can be opened from within a browser or added to an HTML file to be automatically opened by a browser.
Offline/Local: Four Function Calc
Microsoft Calculator
Located in the Start Menu
This is the standard calculator that come installed on the Windows operating system.
Microsoft Calculator Plus
Microsoft Calculator Plus is a free download available from Microsoft for a Validated (genuine) version of Windows. The Calculator Plus includes the Standard and Scientific calculator, and adds a Conversion calculator, that will convert things like Length, Volume, Temperature, and even Currency (with an automated import from the European Bank). One additional feature is a non-Classic view theme that is a little more colorful.
Moffsoft Freecalc (Win)
Moffsoft FreeCalc is a free, four-function calculator that performs all of the necessary functions. The calculator also supports different color schemes to offer varying levels of contrast. The calculator also incorporates a printable "tape", to keep track of each calculation. The size of the buttons automatically adjust proportionally to the size of the window.
eCalc Basic Calculator (Win/Mac)
The eCalc basic calculator is a great four-function calculator. The calculator keys are color-coded by function. Additional keys include an Exponent and Inverse key.
CLIPS Calculator
The CLIPS Calculator is actually an online calculator, but the creators allow for the download of the SWF (Flash) file, making it available offline. The file can be opened from within a browser or added to an HTML file to be automatically opened by a browser. It can serve as a four-function, scientific, graphing, or conversion calculator. Colored buttons give the user the ability to change the color theme for the calculator.