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Triangle Calculator

Files stay on your device · 100% private Runs in your browser

Solve any triangle from SSS, SAS, or ASA inputs: all sides, angles, area, and type.

How it works: fill the known parts using the lettering on the diagram — each side sits opposite the angle with the same letter — and every remaining side, angle, and the area are solved with the law of sines and cosines.
Enter the known parts of the triangle.

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How to Use Triangle Calculator

1

Select or Upload

Choose your file or paste your input into the workspace above. Drag and drop is supported.

2

Configure & Process

Adjust options to fit your task. Processing runs immediately with no waiting queue.

3

Download Result

Preview and save your output in one click with no watermarks or sign-up prompts.

Private & Confidential

Browser tools process files locally on your device, and server temporary files are deleted automatically within 15 minutes.

Free & No Registration

Full access to every utility without creating an account, signing in, or hitting paywalls.

Works on Any Device

Responsive layout that runs smoothly on desktop, tablet, and mobile browsers across all operating systems.

Frequently Asked Questions

Is Triangle Calculator completely free to use?

Yes, Triangle Calculator on KiloToolbox is 100% free with no limits, hidden fees, or account sign-up required.

Are my files safe and private?

Yes. Triangle Calculator processes all files directly inside your web browser using client-side JavaScript and WebAssembly. Your files never leave your computer or mobile device and are never uploaded to any remote server.

Can I use Triangle Calculator on mobile phones and tablets?

Yes, KiloToolbox is fully responsive and runs smoothly on iPhone, Android, iPad, Mac, Windows, and Linux.