You can easily convert 40 square meters into square feet using each unit definition:
With this information, you can calculate the quantity of square feet 40 square meters is equal to.
In 40 sq m there are 430.55642 sq ft.
Which is the same to say that 40 square meters is 430.55642 square feet.
Forty square meters equals to four hundred thirty square feet. *Approximation
Performing the inverse calculation of the relationship between units, we obtain that 1 square foot is 0.002322576 times 40 square meters.
A square foot is zero times forty square meters. *Approximation