You cannot.
A millimetre is a measure of length in 1-dimensional space while a square metre is a measure of area in 2-dimensional space. The two measure different things and, according to basic principles of dimensional analysis, any attempt at conversion from one to the other is fundamentally flawed.
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3,500 mm = 37,673.7 ftft
0.62 Sq m
1 sq m = 100,000,000 sq mm
Is it width or height? you have to provide 2nd value,like width (mm) x height (mm) = sq mmYou can convert mm to meters first thenwidth (m) x height (m) = sq meterHopefully it helps you :)--------------------Above answer generated with the help of WWW.FMEOS.COM application.
20 sq cm = 20*100 sq mm = 2000 sq mm