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Calculator

Scientific calculator with history — no eval.

Arithmetic and scientific calculator with history (no eval).

  • Side panel
  • Command palette
Add to Chrome(opens the Chrome Web Store in a new tab)or pressCtrlShiftSpace
One Panel Search tools

Calculator

Side panel

Arithmetic

Ready01 / 04

01Features

What it does

  1. 01Arithmetic
  2. 02Scientific functions
  3. 03History
  4. 04Keyboard input

02Use cases

When you'll reach for it

Quick maths while reviewing a spec
Check a percentage

How to open it

  1. 1

    Side panel

    Click the One Panel icon in the toolbar and search for “Calculator”.

  2. 2

    Command palette

    Press Ctrl + Shift + Space on any page and type its name.

Privacy

  • Runs entirely inside your browser. No account, no analytics, no remote code.

Keep going

Pairs well with

Calculators

Unit Converter

Convert length, weight, temperature, data, speed and more.

Calculators

Number Base Converter

Convert between binary, octal, decimal and hexadecimal with bit view.

Date & Time

Date & Time Toolkit

Convert timestamps, calculate dates, compare time zones and preview cron schedules.

Screenshots

Capture Toolkit

Capture the visible tab and annotate with shapes, text, highlight and blur.

Screenshots

Screen Recorder

Record a tab, window, or your whole screen with mic and tab audio, then save or share it.

Image

Save Image As Type

Right-click any image and save as JPG, PNG, WebP, GIF, or PDF — converted locally.

Get Calculator and 80 more

One install adds every tool to your side panel. No account, nothing to configure.

Add to Chrome(opens the Chrome Web Store in a new tab)