High precision scientific calculator with full support for physical units (web and terminal versions).


The best open source alternative to Wolfram Alpha is Numbat. If that doesn't suit you, our users have ranked more than 50 alternatives to Wolfram Alpha and 12 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Wolfram Alpha are GeoGebra Classic, GeoGebra Scientific Calculator, NaSC and SymPy Gamma.
High precision scientific calculator with full support for physical units (web and terminal versions).


Free online apps bundle from GeoGebra: get graphing, geometry, algebra, 3D, statistics, probability, all in one tool!

Free online scientific calculator from GeoGebra: perform calculations with fractions, statistics and exponential functions, logarithms, trigonometry and much more!




Its an app where you do maths like a normal person. It lets you type whatever you want and smartly figures out what is math and spits out an answer on the right pane. Then you can plug those answers in to future equations and if that answer changes, so does the equations its...



SymPy Gamma is a simple web application that executes and displays the results of SymPy expressions as well as additional related computations in a fashion similar to that of Wolfram Alpha.

NumWorks designed an intuitive and evolutive graphing calculator to make learning maths easier.




A calculator with syntax highlighting that supports user-defined variables and functions, math-like syntax, and some more advanced operations such as derivation and integration (estimate), and complex numbers.



galculator is a GTK 2 / GTK 3 based calculator with ordinary notation/reverse Polish notation (RPN), a formula entry mode, different number bases (DEC, HEX, OCT, BIN) and different units of angular measure (DEG, RAD, GRAD).

The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.

NoteCalc is a handy calculator trying to bring the advantages of Soulver to the web.

GeoGebra Discovery is an experimental version of GeoGebra. It contains some bleeding edge features of GeoGebra that are under heavy development and therefore not intended for every day use yet, so they are not included in the official GeoGebra version.



