Enter a base and height, or two sides and the angle between them, to calculate a parallelogram's area.
How to Use the Parallelogram Area Calculator
In Base & Height mode, enter the base and the perpendicular height. In Two Sides & Angle mode, enter both side lengths and the angle between them instead.
Base & Height: area = base × height
Two Sides & Angle: area = side a × side b × sin(angle)Both formulas describe the same shape, just from different starting measurements — height is rarely something a tape measure reads directly (it's perpendicular to the base, not along an edge), so the angle version exists for exactly the cases where a protractor reading is easier to get than a plumb-line height.