Parallelogram Calculator
Enter the base, side, and perpendicular height using one consistent length unit.
A QUICK WALKTHROUGH
How to use this tool
- Enter base, side, and height.
- Choose Calculate.
- Review area, perimeter, and angles.
Formulas and units
Area = base × height. Perimeter = 2 × (base + side). The acute interior angle is arcsin(height ÷ side); the other angle is 180° minus it. Use one unit for all lengths; area is in squared units and angles are in degrees.
Validation
All three lengths must be positive finite numbers, and the height cannot exceed the side length.
Local calculation
All calculations happen locally in your browser.
GOOD TO KNOW
Common questions
What units are supported?
Any unit is supported when all lengths use the same unit.