Rhombus Area Calculator
Calculate rhombus area using diagonals, or side length and angle, with this free calculator that gives instant results in your browser.
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Shape
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the two diagonals.
- Press Calculate.
How it works
Area = (diagonal 1 × diagonal 2) ÷ 2.
Worked example
diagonals 6 m and 8 m. = 24 m².
Common mistakes
- Multiplying the diagonals without halving — area is half their product.
- Using the side length alone; a rhombus's area needs the diagonals, or base and height.
Frequently asked questions
How do I find the area of a rhombus?
Multiply the two diagonals and halve the result: Area = (d1 × d2) ÷ 2. You can also use base × height.
Are all rhombuses squares?
No — a square is a special rhombus with right angles. A rhombus has four equal sides but its angles can be oblique.
I know the side and an angle, not the diagonals.
This tool uses the two diagonals. With a side and angle, use area = side² × sin(angle) instead.
Related tools
- Parallelogram Area Calculator
- Square Area Calculator
- Ellipse Area Calculator
- Equilateral Triangle Area Calculator
- Regular Hexagon Area Calculator
- Regular Pentagon Area Calculator
Explore more in Geometry, Shape, Area & Volume.
Cite this tool
Zerdly. (2026). Rhombus Area Calculator. Retrieved from https://www.zerdly.com/tools/rhombus-area-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.