Matrix Calculator
Add, multiply, invert, reduce — in exact fractions where they stay small, with the full elimination working shown step by step. Sizes from 1×1 up to 8×8.
A
3×3B (second operand / b vector)
3×3Operations
Result
Run an operation to see the answer and its working.
About this tool
Every entry is stored as an exact rational number and reduced with the greatest common divisor, so results print as fractions whenever the numerators and denominators stay inside safe-integer range — beyond that the number formatter falls back to huge integers rather than pretending to be exact. Determinants use LU with partial pivoting, inverses use Gauss-Jordan on [A | I], and both write out their elimination steps. The whole calculator runs in your browser.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is Matrix Calculator really free?
Yes. Matrix Calculator is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does Matrix Calculator upload my data?
No. Matrix Calculator runs entirely inside your browser, so anything you type, paste, or open stays on your own device.
Do I need to sign up or install anything?
Neither. There is no account and nothing to download — open the page and Matrix Calculator is ready to use on desktop or mobile.
Does Matrix Calculator work offline?
Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.
More design & visual
CSS Gradient Generator
Create linear CSS gradients with a live preview.
CSS Box Shadow Generator
Build and preview CSS box-shadow values with one-click copy.
CSS Glassmorphism Generator
Generate frosted-glass CSS with backdrop blur and copy-ready styles.
QR Code Generator
Generate custom QR codes for any text or URL.
WiFi QR Code Generator
Generate a scannable QR code to share WiFi credentials instantly.
Letter Profile Picture
Generate avatar images from initials with custom colors.