How to use this calculator
Measure the base, then the perpendicular distance to the opposite parallel side. Do not substitute the length of a sloping edge.
Formula
A = b × h
Worked example
A parallelogram with base 9 m and perpendicular height 4 m has area 9 × 4 = 36 m².
Assumptions and limits
The figure is assumed to have two pairs of parallel sides. The adjacent sloping side is unknown, so perimeter is not determined.
Frequently asked questions
Does leaning the shape change its area?
If base and perpendicular height stay the same, the area remains the same.
What units should I use?
Choose your input unit, then enter every dimension in that unit. The result unit can be changed independently.
Does this include waste or material costs?
No. This is geometric area only. Add openings, overlap, cutting waste, prices and installation requirements separately.
Calculated locally; rounded only for display.