Triangle Area Calculator
Calculate the area of a triangle from its base and height.
About Triangle Area Calculator
The area of a triangle is half the product of its base and perpendicular height. This applies to any triangle regardless of shape.
Formula
Triangle Area
A = ½ × base × height
- b
- Length of the base
- h
- Perpendicular height to the base
Worked example
With the default values below, Triangle Area Calculator returns Area of 30.0000. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Baseminimum 0 units
- 10 units
- Heightminimum 0 units
- 6 units
Results
- Area
- 30.0000 sq units
Step by step
- 1Apply formula= 30
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
Does it matter which side I pick as the base?
No. Any side can be the base, as long as you use the perpendicular height to that side.
What if I only know three sides?
Use Heron's Formula instead, which computes area from three side lengths without needing the height.