About the Parallelogram Calculator
Area, perimeter and diagonals of a parallelogram from two sides and the angle between them.
Also known as: parallelogram area, area of parallelogram, rhombus area.
How to use this calculator
- Enter side a, side b, angle between sides.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
A = a·b·sin θ = base × height
Worked example
Using the values pre-filled in the calculator above:
- Side a = 8
- Side b = 5
- Angle between sides = 60 °
the calculator returns:
- Area: 34.641016
- Perimeter: 26
- Height (to side a): 4.330127
- Long diagonal: 11.357817