How do you find the area of a regular hexagon?

Area = (3√3 ÷ 2) × side². A regular hexagon is made of six equilateral triangles, which is where this formula comes from.

What is the difference between the long and short diagonal?

The long diagonal runs vertex to vertex and equals twice the side length. The short diagonal runs across the flats and equals the side length times the square root of 3.

Does this tool upload anything?

No — all maths happens in your browser and no data is sent anywhere.

Hexagon Calculator

Area, perimeter, diagonals and apothem of a regular hexagon.

Regular hexagon calculator

Tell the tool what you know — the side length, the long or short diagonal, or the area — and it derives every other property of a regular hexagon: area, perimeter, both diagonals and the apothem.

The area of a regular hexagon is (3√3 ÷ 2) × side², the long diagonal is 2 × side and the short diagonal is side × √3. All calculations stay in your browser.