Parallelogram Calculator – Calculate Area and Perimeter

How to Use the Parallelogram Calculator

Enter base, height and side length to calculate area and perimeter.

Practical Example

A parallelogram with base 9, height 4 and side 6 has area 36 square units and perimeter 30 units.

Factors That Affect the Result

Area uses perpendicular height, not the slanted side. Perimeter uses the two side lengths.

Frequently Asked Questions

Is height the slanted side?

No. Height is perpendicular to the base.

How is area calculated?

Multiply base by perpendicular height.

Can I use any unit?

Yes, if all lengths use the same unit.

Related Tools

• Rhombus Calculator
• Trapezoid Calculator
• Regular Polygon Calculator
• Area Calculator
• Hexagon Calculator

Working with Parallelograms

A parallelogram’s area is base × perpendicular height, while perimeter is 2(a + b). The slanted side length is not a substitute for perpendicular height when calculating area.

This distinction matters in geometry, flooring and material layouts. Measure height at a right angle to the chosen base and keep units consistent. If only side lengths and an angle are known, area can also be found with ab sin θ. Use the formula that matches the measurements you actually have.