There is no equivalence. A metre is a measure of length or distance in 1-dimensional space while a square metre (m 2) is a measure of area in 2-dimensional space.The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.here is no equivalence. A metre is a measure of length or distance in 1-dimensional space while a square metre (m 2) is a measure of area in 2-dimensional space.