About this calculator
Calculate rectangular area in square feet and square metres.
Split irregular rooms into rectangles, calculate each, then add them.
Formula
Area = length × width. 1 ft² = 0.092903 m².
Example
12ft × 10ft = 120ft².
Accuracy
NUMTX shows the assumptions next to the calculation so you can replace defaults with values that match your situation. For measurements, supplier rates, fees, interest, tax or regulated work, confirm important figures with the appropriate official or professional source.