Perimeter of an Equilateral Triangle Calculator

Summary

Enter a side length to instantly calculate the perimeter, area, and height of an equilateral triangle.

How it works

1. Enter the side length of the equilateral triangle in the input field.
2. Choose your preferred unit (mm, cm, m, km, in, ft, yd).
3. The perimeter is calculated as P = 3 × side.
4. The height is calculated as h = (√3 / 2) × side.
5. The area is calculated as A = (√3 / 4) × side².
6. Copy any result with the copy button next to it.

Use cases

• Quickly find how much fencing or trim is needed for a triangular shape.
• Check geometry homework answers for equilateral triangle problems.
• Calculate material needed for triangular tiles or panels.
• Estimate dimensions when designing logos or decorative elements.
• Teaching or learning the relationship between side, perimeter, height, and area.
• Engineering and carpentry projects requiring precise triangle measurements.

Frequently Asked Questions