Sidebar Calc: Scientific Calculator is a fast calculator extension for your browser side panel. Open a simple and scientific calculator next to any webpage, solve math without switching tabs, reuse calculation history, and copy results instantly while you browse.
Use Sidebar Calc when you need a quick calculator, scientific calculator, math solver, percentage calculator, root calculator, or expression calculator directly in your browser. It stays in the side panel, so your calculation is always beside your work instead of hidden in another tab or separate app.
Why install Sidebar Calc:
- Side panel calculator that opens beside the current page
- Quick arithmetic for everyday math, shopping, budgeting, and work
- Scientific calculator mode with sin, cos, tan, inverse functions, log, ln, powers, roots, factorials, percentages, pi, and e
- Full expression input with parentheses for multi-step calculations
- Degree and radian support for trigonometry
- Calculation history to reopen and reuse previous expressions
- One-click copy for answers and results
- Light and dark themes for comfortable use
- Compact interface designed for the browser sidebar
- No distracting floating windows and no need to leave the page you are reading
Popular ways to use it:
- Calculate prices, discounts, taxes, percentages, and totals while shopping online
- Solve homework, study, and engineering math in the same browser window
- Run quick developer, finance, analytics, and spreadsheet calculations
- Keep a reusable calculator history while comparing numbers across websites
- Use a clean side panel calculator instead of a new tab calculator or desktop app
Sidebar Calc is built for people who search for a side panel calculator, sidebar calculator, scientific calculator extension, browser calculator, quick math tool, or calculator with history. It combines everyday arithmetic and scientific functions in one focused extension that is always one shortcut away.
Keyboard shortcut:
- Open it from the toolbar button, or set a custom shortcut on your browser's extension shortcuts page
If you want a calculator that stays open while you browse, Sidebar Calc gives you fast math, scientific functions, history, and copy-ready results in the browser side panel.
Open source — source code, issues, and feature requests:
https://github.com/lenadweb/sidebar-calc
Opera browser required.
