OpalCalc Alternatives

SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .

Qalculate! is a multiplatform multi-purpose desktop calculator.

NEURONwriter is an AI-powered tool for writing and optimizing content for SEO. With a user-friendly interface and advanced content editor, it is designed to help you quickly write and optimize high-quality SEO-friendly content.

Try for free Free Trial $19.0 / Monthly ("Bronze", "2 projects”, "25 analyses", "15.000 AI credits" )

Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.

Numi is a beautiful text calculator for Mac.

High precision scientific calculator with full support for physical units.

Get help, support, and tutorials for Windows products—Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.

WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

Calculator for the GNOME Desktop Environment, formerly known as gcalc (and gcalctool CLI).

fxSolver is an free online math solver, equation library, graphing calculator and science/engineering problem helper. To get started, add some formulas, fill in any input variables and press "Solve."

Browser-based notepad built for math calculations.

Bricks is a note-taking web app with a built-in calculator. It can be installed as a desktop or mobile app, because of PWA technology this app built with. Which is also makes it offline available. Notes created with Bricks can be shared.

Simple yet very effective calculator with print capabilities and log registration.

galculator is an open source scientific calculator with a modern GUI and a wide range of operation modes. It supports algebraic, reverse polish (RPN) and paper mode notations.