Scientific Calculator

The calculator was written by Rolf Howarth in early 1996. His employer, Square Box Systems Ltd, have kindly agreed to continue hosting the calculator on this site. (Click here to find out what he works on now...)

A fully featured scientific calculator with proper operator precedence is implemented, including trig functions and logarithms, factorials, 12 levels of parentheses, logs to base 2 (a handy function for information entropists!), bitwise logical operators, hex, octal, binary and ascii display.

The calculator is written in JavaScript and you are welcome to view the JavaScript source (visible within the HTML page) for personal educational purposes as long as you recognise that it is copyrighted and not in the public domain.

This calculator is now available as part of Hummingbird's Enterprise Information Portal. All enquiries regarding licensing the calculator should be directed to Hummingbird Ltd.