Simple Calculator
Instant calculator in your browser toolbar
Simple Calculator puts a clean, fast calculator in your browser popup so you never need to switch apps or open a new tab for quick math.
How It Works
Install
Add from Chrome Web Store. No account needed.
Click
Click the extension icon on any page.
Done
Instant results. Works everywhere.
The Problem
Opening a new tab or switching apps just to do quick math breaks focus
The OS calculator takes too long to open during fast-paced workflows
Copy-pasting numbers between tabs to calculate wastes time and causes errors
Features
Popup Calculator
Full calculator accessible from the toolbar in under a second — no tab needed.
Calculation History
Scrollable log of last 20 calculations so you can refer back without re-typing.
Keyboard Support
Full numpad and keyboard input so you never need the mouse for calculations.
Copy Result
One-click copy of the current result to paste it directly where you need it.
Permissions Transparency
We believe in full transparency. This extension only requests what it needs:
We never access your browsing history, passwords, or personal data.
Free to Use
No credit card. No account. Just install.
Free
- Basic calculator
- Keyboard input
- Copy result
Pro
- Calculation history
- Scientific mode
- Currency conversion
- Keyboard shortcuts
Frequently Asked Questions
Does it require any permissions?
No — the calculator runs entirely in the popup with zero page access.
Can I use it without a mouse?
Yes, open with the keyboard shortcut and operate entirely via numpad.