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Math Calculators
Equilateral Triangle Calculator
Calculate an equilateral triangle's height, area and perimeter from its side length, in the unit of your choice.
Height
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Area
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Perimeter
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About the Equilateral Triangle Calculator
An equilateral triangle has three equal sides and three 60° angles. Its height, area and perimeter are all determined by a single side length. The side has its own unit selector, and so does every result, so you can enter one unit and read results in another.
Formulas: Height = (s√3)/2 · Area = (√3/4)s² · Perimeter = 3s
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