How to convert from square feet (ft2) to cubic meters (m3)?
The area in square feet (ft2) must be multiplied by the thickness in feet and divide by 35.3. The result is a volume of cubic meters (m3).
Volume cubic meters = Area square feet x thickness feet
m3 ≈ ft2 x ft / 35.3
m3 = ft2 x ft / (1 / 0.3048 x 1/0.3048 x 1/0.3048) ≈ ft2 x 1 ft / 35.314667
1 ft = 0.3048 m ⇒ 1 m = 1/0.3048 ft