đē Triangle Area Calculator
Calculate area (heron), perimeter instantly from side a, side b, side c.
How to use the Triangle Area Calculator
- Enter Side a, Side b, Side c.
- The result updates instantly as you type.
- Copy or note down your result.
How it works
Formulas: Area (Heron) = sqrt((([Side a]+[Side b]+[Side c])/2)*(([Side a]+[Side b]+[Side c])/2-[Side a])*(([Side a]+[Side b]+[Side c])/2-[Side b])*(([Side a]+[Side b]+[Side c])/2-[Side c])); Perimeter = [Side a]+[Side b]+[Side c].
Example
Using the default values (Side a: 5, Side b: 6, Side c: 7):
Area (Heron)14.6969
Perimeter18
FAQ
Is the Triangle Area Calculator free to use?
Yes. It is free, needs no signup and has no usage limits.
Is my data safe?
Yes. Everything is calculated in your browser, so what you type or upload is never sent to a server.
Can I use it on my phone?
Yes. KsWebProduction is built mobile-first and works in any modern browser.