[Ordinary calculators]
[Special calculations]
 Scientific calculator
 Calculator with some scientific functions. Includes a calculator for logical and hexadecimal computations.
 Calculator
 Scientific calculator with many builtin functions.
There is also a
simple version
of this calculator, with the same builtin functions.
 MG SuperCalc
 Computes on arbitrarily big numbers. Operates in Hexadecimal,
Decimal, Octal or Binary mode. Very few functions implemented, and long
loading time.
(Copyright by MGSOFT Corporation. All rights
reserved.)

Exponential Expression Calculator
 Computes exponential expressions ( x^{y} ) up to 10^{308}.
(All Rights Reserved Daniel C.Person. JavaScript)

Calculators
 Three calculators: one for modular calculations, one for polynomial and one permutation calculator.
(Copyright Eindhoven University of Technology)
 Base converter
 Converts numbers in different bases; binary, ternary (base 3), quintal (base 5), octal, decimal and hexadecimal.
(Copyright Alexander Bogomolny)

Cocalc RPN Calculators
 Scientific calculator with all standard features and including Hex and Binary notation plus some extra functions. Uses Reverse Polish Notation, and includes a tutorial for this.
(Copyright by CoHort Software.)
 HexCalc
 64bit calculator in hexadecimal, decimal or binary base. Provides support for logical binary expressions (and, or, negation and left and right shift.)
(Source code avaliable.)

Precise Calculator
 Graphic, programable calculator.
(Source code avaliable.)
 Calculator
online
 Simple textbased calculator.
(CGIscript.)
 Physics computer
 Calculator using Reversed Polish Notation. Including many pysical constants and conversion factors.
(JavaScript)

Calculator

Calculator including basic features.
(JavaScript)

Qwibnar's Web Calculator
 Complex numbers calculator.
(JavaScript)

The HTML Calculator
 Calculator using reversed polish notation with most basic operators.
(Copyright Alexander Rau. JavaScript)

Virtual Calculator
 Basically the same as above, and includes some explanation of RPN.
(Copyright P. Lutus. JavaScript)
 Symbolic calculator
 Solves a symbolic equation with respect to any variable.
(JavaScript)

Computing a sum
 Computes the sum of a given expression given upper and lower limits.
(Mathserv. CGI)
 Basic
Summation Formula
 Computes the n'th sum in one of the 18 predefined series.
(Copyright jun Ni. JavaScript)
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