Geometry
Triangle Area Calculator
Area from base and height, or from three sides (set height to 0 to use Heron).
Free to use — no sign-up or login.
Area
Amortization schedule
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This free Triangle Area Calculator covers Area from base and height, or from three sides (set height to 0 to use Heron).
Base-height is (1/2)bh; otherwise Heron’s formula from three sides. Related geometry tools sit beside How it works, with no account required.
Using the Triangle Area Calculator
Area from base and height, or from three sides (set height to 0 to use Heron). Typical inputs are Base b (or side a), Height h (0 = Heron), Side b (Heron) and Side c (Heron). How it works beside the form states the identity the Triangle Area Calculator applies.
FAQ
How do I use the Triangle Area Calculator?
Open the Triangle Area Calculator, fill Base b (or side a), Height h (0 = Heron), Side b (Heron) and Side c (Heron), and read the result. Base-height is (1/2)bh; otherwise Heron’s formula from three sides.
What formula does the Triangle Area Calculator use?
The Triangle Area Calculator uses the identity in How it works. In words: Base-height is (1/2)bh; otherwise Heron’s formula from three sides.