Room Area Calculator

Break your room into rectangular sections. For an L-shaped room, use two rectangles. For more complex shapes, add as many sections as needed.

Load a preset shape to get started quickly.

Calculation Method

The room area calculator uses a simple decomposition approach:

1. Divide the room into rectangular sections along natural boundaries (walls, corners, offsets)
2. Measure the length and width of each section
3. Calculate the area of each section: Area = Length × Width
4. Sum all section areas for the total room area

Tips for Measuring Irregular Rooms

• L-shaped rooms: Split into 2 rectangles at the inner corner
• T-shaped rooms: Use 2 rectangles — the top bar and the stem
• U-shaped rooms: Use 3 rectangles — left wing, bottom, and right wing
• Alcoves and nooks: Add each recess as a separate small section
• Closets: Measure and add as a separate section if you want to include them

Unit Conversions

• 1 sq ft = 0.0929 sq m
• 1 sq m = 10.764 sq ft
• 1 sq yd = 9 sq ft
• 1 acre = 43,560 sq ft