What is Triangle Calculator?
Triangle Calculator helps you solve various triangle computation problems. Supports SSS (three sides known), SAS (two sides and included angle known), ASA (two angles and one side known), and more — automatically calculates all unknown sides, angles, area, and perimeter. Whether you are a student learning geometry, an engineer computing structural parameters, or a designer planning spatial layouts — this tool gives you accurate results instantly. All calculations run locally in your browser.
Use Cases
- ◆Student geometry homework
- ◆Engineering structural parameter calculation
- ◆Architectural design dimension calculation
- ◆Land area measurement
- ◆Trigonometry teaching demonstrations
How to Use
- 1Enter known sides or angles
- 2Click calculate
- 3View all computed results
- 4Copy results for homework or reports
Features
- ✓Free
- ✓Multiple known-condition support
- ✓Instant calculation
- ✓Area and perimeter
- ✓Angles precise to decimal
FAQ
Is this tool free?
Yes — completely free. No accounts, no paywalls. Just open the page and go.
Does my data get sent to a server?
No. Everything runs in your browser. Your data never leaves your device.
Does it work on my phone?
Absolutely. Works great on phones, tablets, and desktops alike.
How fast is it?
Instant for most inputs. Large datasets might take a second or two.
Do I need to be online?
You need the internet to load the page the first time. After that, it works offline.