Triangle Area Calculator
Area and perimeter of a triangle from three sides. Enter the dimensions and get instant results with the formulas below.
- Free
- No signup
- Private: runs in your browser
- Works on mobile
Triangle Area Calculator tool
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Example
With the default values shown in the tool, the results look like this:
- Area (Heron)
- 6
- Perimeter
- 12
How to use Triangle Area Calculator
- Enter your values in the fields above.
- The result updates instantly as you type or change an option.
- Copy the result or note it down. Nothing is saved on our servers.
Why use DocConvertPRO?
- Free to use with no signup or watermark.
- Everything runs in your browser. Your input is not uploaded.
- Works on phones, tablets and computers.
- Made for Indian users: rupees, lakh/crore formats and local use cases.
About this tool
Use the same unit for every measurement. Area results are in square units and volume results in cubic units.
Frequently asked questions
Which unit does it use?
Any consistent unit: results follow your input unit.
Is π exact?
The calculator uses the full precision of π.
Can I calculate the reverse?
Rearrange the formula or try different inputs.