The best open source alternative to Engineering Calculator is SpeedCrunch. If that doesn't suit you, our users have ranked more than 50 alternatives to Engineering Calculator and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Engineering Calculator are Qalculate!, Calcpad, GeoGebra Scientific Calculator and Windows Calculator.
SpeedCrunch is a free, fast, high precision open source algebraic calculator with an intuitive interface and many features, such as variables, syntax highlighting, functions, persistent input history & more.
Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation).
Calcpad is a lightweight mathematical platform for cloud and desktop. It parses simple text scripts and converts them into professional Html reports. Supports complex numbers, variables, functions, graphing, units and numerical methods.
Free online scientific calculator from GeoGebra: perform calculations with fractions, statistics and exponential functions, logarithms, trigonometry and much more!
A simple yet powerful calculator that includes standard, scientific, and programmer modes, as well as a unit converter. It's the perfect tool to add up a bill, convert measurements in a recipe or other project, or complete complex math, algebra, or geometry problems.
Calculator++ is an advanced, modern and easy to use scientific calculator.
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).
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.
NumWorks designed an intuitive and evolutive graphing calculator to make learning maths easier.
The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.
Germany
EU
Sweden
Bulgaria
Austria
United States
Russia
France
Czechia
Hungary