One of the most popular alternatives to Windows Calculator is SpeedCrunch, which is free and open source. Other popular alternatives are Qalculate!, OpenCalc, Calculator You and GeoGebra Scientific Calculator. Calculators like Windows Calculator are a crowded field, with more than 100 alternatives for Windows, Android, Mac, iPhone and the web.
Sicyon is an all-in-one scientific calculator for every student or professor, researcher or developer - everybody doing physics or chemistry / science or engineering using formulas and tables of constants.
Calca is a powerful symbolic calculator that updates as you type giving you instant answers. It solves equations and simplifies complex expressions. It's also a rich Markdown text editor so that you can explain your ideas alongside your calculations.
United States
Qaltex is a tape-like calculator with straightforward interface and a lot of features. It is inspired by many other similar applications, but solves their disadvantages and at the same time it is empowered with some unique options and widgets.
Kalk is a convergent calculator application built with the Kirigami framework. Although it is mainly targeted for mobile Linux platforms, it can also be used on the desktop.
Germany
EU
Free scientific calculator which saves you time and frustration by providing unique easy to use tools.
Calculator is a basic calculator application made by Apple Inc. and bundled with its macOS, iOS, and watchOS operating systems. It has three modes: basic, scientific, and programmer. The basic mode includes a number pad, buttons for adding, subtracting, multiplying, and...
United States
Calcul.io offers realtime calculator with notepad like interface and advanced features like unit conversions, currency rates or date time math.
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...
United States
FP Calculator is a calculator app for iPad&iPhone, which includes basic calculations, scientific calculations, and currency conversion functions.
United Kingdom
Online calculator tool with 3D graph render, 2D function graphs, scientific calculator and integral calculator.
