Rhombus Formulas
2D Shapes
Rhombus
- Area
- A = ½ × p × q
- Side
- s = ½ √(p2 + q2)
- Perimeter
- P = 4s
- p, q diagonals
- s side
Rhombus formulas explained
A rhombus has four equal sides. Its diagonals cross at right angles, so its area is half the product of the diagonals. Below are all the rhombus formulas with what each letter means, a worked example and a free calculator.
- Area:
A = ½ × p × q - Side:
s = ½ √(p² + q²) - Perimeter:
P = 4s
Rhombus calculator
Live calculator
Rhombus calculator
Worked example: area of a rhombus
Given Diagonal p = 8 cm, Diagonal q = 6 cm, substitute the values into each rhombus formula:
- A = ½ × 8 × 6 = 24 cm²
- s = ½ √(8² + 6²) = 5 cm
- P = 4 × s = 20 cm
Rhombus Formula SheetFormulas, variables, a worked example and practice questions with answers.Download PDFOpen
Rhombus formulas FAQ
What is the formula for the area of a rhombus?
The area of a rhombus is A = ½ × p × q, where p, q are the diagonals.
What is the formula for the side of a rhombus?
The side of a rhombus is s = ½ √(p² + q²), where p, q are the diagonals, s is the side.
What is the formula for the perimeter of a rhombus?
The perimeter of a rhombus is P = 4s, where s is the side.
Can I download the rhombus formulas as a PDF?
Yes. Use the Download PDF button on this page for a free printable rhombus formula sheet with a worked example and practice questions.
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