Rhombus Diagonal Calculator

Use this rhombus diagonal calculator to quickly calculate rhombus diagonal using the area and the other diagonal. Apply the diagonal of rhombus formula for precise results.

Formula

Unknown Diagonal = (2 × Area) ÷ Known Diagonal

Area = area of the rhombus
Known Diagonal = one of the diagonals
Divide double the area by the known diagonal to get the unknown diagonal.

Popular Examples

AreaKnown DiagonalUnknown Diagonal
1264
40108
30125
3288
751510

How To Calculate Without A Calculator

1. Measure the area of the rhombus.
2. Measure the known diagonal.
3. Multiply area by 2 and divide by the known diagonal to get the unknown diagonal.

About This Calculator

This rhombus diagonal calculator automatically computes the unknown diagonal using the correct diagonal of rhombus formula with up to six decimal places.

Interesting Facts About Rhombus Diagonals

• Diagonals bisect each other at right angles.
• Each diagonal divides the rhombus into two congruent triangles.
• The sum of the squares of the diagonals equals the sum of the squares of all sides (Pythagorean relation).
• Diagonals are important in tiling and design.
• Diagonal lengths help calculate area quickly.