Chrome, OperaSidebar Calc Math, one keystroke away.
A browser sidepanel calculator. Lives next to your work, CRM, spreadsheet, doc, never on top of it.
Chrome, Opera
Dark and light modes with seamless transitions
Sidebar Calc features
- Sidepanel-native
- Built on Chrome’s native sidepanel. Doesn’t cover the page, doesn’t pop a window, never loses state.
- Two modes
- Simple for quick math, scientific for trig, logs and parentheses. Switch with one keystroke.
- Keyboard-first
- Numpad, arrow-key history scrubbing, copy result, theme toggle. Mouse never required.
Questions, Answered
What is Sidebar Calc?
Sidebar Calc is a calculator extension that opens in the browser’s side panel, next to the page you are working on. You can do quick math in a spreadsheet, CRM or doc without switching tabs or covering the page.
How do I open Sidebar Calc with the keyboard?
In Chrome, press Ctrl+Shift+L, or Cmd+Shift+L on a Mac. You can type the whole expression, press Enter for the result and copy it with Ctrl+C or Cmd+C.
Does Sidebar Calc have a scientific mode?
Yes. Scientific mode adds sin, cos and tan with their inverses, log and ln, powers and roots, factorial, percent, π and e, with a degrees and radians switch.
Which browsers does Sidebar Calc support?
Sidebar Calc works in Chrome 114 and later through Chrome’s native side panel, and in Opera through its sidebar. It is free and open source.
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