Room Area Calculator

Calculate room area and perimeter in square meters or square feet. Add multiple rooms for a total project area.

Area 20.00 Perimeter 18.00 m

How to Calculate Room Area

For a rectangular room, multiply the length by the width. This gives you the floor area in square units (m² or ft²).

Formula: Area = Length × Width

Perimeter: Perimeter = 2 × (Length + Width)

Example

A living room measuring 6.5 m × 4.2 m has a floor area of 27.30 m² and a perimeter of 21.40 m.

When You Need Room Area

Room area calculations are essential for flooring estimates, painting costs, furniture planning, heating/cooling sizing, and architectural visualization projects.

Frequently Asked Questions

How do I calculate room area?
Multiply the room length by the room width. For example, a 5m × 4m room has an area of 20 m².
How do I convert square meters to square feet?
Multiply square meters by 10.764 to get square feet. For example, 20 m² = 215.28 ft².
Can I calculate the area of an L-shaped room?
Split the L-shaped room into two rectangles, calculate each separately, and add the areas together. Use the "Add room" button to calculate multiple sections.

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