Rhombus Calculator

Use our free rhombus calculator to compute the area and perimeter of any rhombus. Enter the lengths of the diagonals and the side.

Math

Diagonal 1 (d1)

Diagonal 2 (d2)

Side Length (s)

Formula

A rhombus is a quadrilateral with four equal sides. Its area can be computed using the formula A = (d1 × d2)/2, where d1 and d2 are the lengths of the diagonals.

A = (d1 × d2)/2, P = 4s

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

How It Works

1Enter the lengths of the two diagonals.
2Enter the side length.
3Click Calculate to find the area and perimeter.
4Area = product of diagonals divided by 2.
5Perimeter = 4 × side length.

Examples

Rhombus with diagonals 10 and 8

1.Enter d1=10, d2=8, s=6.4.
2.Area = (10 × 8)/2 = 80/2 = 40 units².
3.Perimeter = 4 × 6.4 = 25.6 units.

Result: Area: 40.0000, Perimeter: 25.6000

Rhombus with diagonals 12 and 9

1.Enter d1=12, d2=9, s=7.5.
2.Area = (12 × 9)/2 = 108/2 = 54 units².

Result: Area: 54.0000

Frequently Asked Questions

Area = (d1 × d2)/2, where d1 and d2 are the lengths of the diagonals.

Yes. A rhombus has four equal sides, which is why the perimeter is simply 4 × s.

Yes, a square is a special rhombus with all angles equal to 90 degrees.

You can find the other diagonal using d2 = 2 × v(s² - (d1/2)²).

Use consistent units. If diagonals are in inches, area is in square inches.

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CalculateMe Team

Last updated: 2026-07-13

Rhombus Calculator

Formula

How It Works

Examples

Rhombus with diagonals 10 and 8

Rhombus with diagonals 12 and 9

Frequently Asked Questions

What is the formula for the area of a rhombus?

Are all sides of a rhombus equal?

Is a square a rhombus?

What if I know one diagonal and the side?

What units should I use?

Related Calculators

Rhombus Calculator

Formula

How It Works

Examples

Rhombus with diagonals 10 and 8

Rhombus with diagonals 12 and 9

Frequently Asked Questions

What is the formula for the area of a rhombus?

Are all sides of a rhombus equal?

Is a square a rhombus?

What if I know one diagonal and the side?

What units should I use?

Related Calculators