Triangle Calculator
Find area, perimeter and angles from three sides.
How to use Triangle Calculator
- Enter the three sides
- Read area and angles
About Triangle Calculator
Triangle Calculator is a free online online tool that lets you find area, perimeter and angles from three sides. It runs entirely in your web browser, so there is nothing to download or install and you never need to create an account.
Simply open the tool, add your content, and get your result in seconds. A live preview lets you check the result before you download it.
Triangle Calculator is 100% free with no limits, no watermarks and no sign-up. Your input is processed securely in your session and is never stored on our servers. Popular searches for this tool include Triangle Calculator, Triangle Area, Heron Formula.
Features
- ✓100% free with no usage limits
- ✓Works in any browser — nothing to install
- ✓Instant live preview of your result
- ✓Mobile, tablet and desktop friendly
Benefits
- ★Save time with fast, one-click processing
- ★No software, no registration and no email required
- ★Your data stays private — nothing is stored
- ★Completely free, with no hidden costs or watermarks
- ★Use it anywhere, on any device with a browser
Frequently asked questions
Is Triangle Calculator free to use?
Yes, Triangle Calculator is completely free with no usage limits, no watermarks and no sign-up required.
Do I need to install software or create an account?
No. The tool runs entirely in your web browser — there is nothing to download and no account to create.
Is my data stored or shared?
No. Your input is processed securely in your session and is never stored or shared.
How do I use Triangle Calculator?
It takes just a few steps: enter the three sides; read area and angles.
Does Triangle Calculator work on mobile and Mac/Windows?
Yes. It works in any modern browser on phones, tablets, Windows, macOS and Linux.