Area Of A Triangle

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Calculate the area of a triangle given its base and height.

Triangle Dimensions

Base (b)

Height (h)

Calculation Results

48.00

Total Area (A)

The space enclosed by the three sides of the triangle.

About this calculator

The Foundation of Geometry

The triangle is the simplest possible polygon. Its area is always exactly half of the parallelogram that would be formed by two identical triangles joined together. This 'half-base-times-height' formula works for any triangle: acute, obtuse, or right-angled.

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Pro Tips

The 'height' must be measured perpendicular to the base.
Any of the three sides can be chosen as the base, as long as you use the corresponding height.
If you know the three sides but not the height, use Heron's Formula (available in our 3 Sides Triangle Area calculator).

Fun Facts

"The sum of angles in any flat triangle is always exactly 180°."
"Triangles are the only polygon that cannot be deformed without changing the length of its sides, making them essential for bridges and trusses."
"The word 'Trigonometry' literally means 'triangle measurement'."

Formula: Area = (Base × Height) / 2