Equilateral triangle area
Solve equilateral triangle area with your values and follow each calculation step.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
A = (√3/4)a²
Variables & units
- Side length
- cm · minimum 0, maximum 1000000
Worked example
A side of 4 cm gives 4√3 ≈ 6.928203 cm².
Assumptions
All three sides must be equal.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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