Floor planning tool
Floor Area Calculator
Calculate the floor area of a room or combine up to eight rectangular sections. Choose different measurement units for each dimension and optionally add a flooring waste allowance.
Enter dimensions
Fill in at least one section. Leave unused sections blank.
Frequently asked questions
How do I calculate floor area?
Multiply the length of a rectangular room by its width. For several rooms, calculate each one and add the results.
Can I enter measurements in feet and metres?
Yes. Select the correct unit for each dimension. The calculator converts the values before adding the areas.
How do I calculate an irregular room?
Divide the room into non-overlapping rectangles, calculate each section, and add the areas. Subtract any excluded cut-outs.