convert square millimetres (mm²) to acres (ac)
one square millimetre (mm²) = 0.000000000247105381467165 acres (ac)

convert square millimetres (mm²) to arpents (a²) Que
one square millimetre (mm²) = 0.000000000292492262460867 arpents (a²) Que

convert square millimetres (mm²) to hectares (ha) 
one square millimetre (mm²) = 0.0000000001 hectares (ha)

convert square millimetres (mm²) to perches (p²) Que
one square millimetre (mm²) = 0.0000000292492262460867 perches (p²) Que

convert square millimetres (mm²) to square centimetres (cm²)
one square millimetre (mm²) = 0.01  square centimetres (cm²)

convert square millimetres (mm²) to square feet (ft²)
one square millimetre (mm²) = 0.0000107639104167097 square feet (ft²)

convert square millimetres (mm²) to square french feet (fr.ft²) Que
one square millimetre (mm²) = 0.00000947674930373207 square french feet (fr.ft²) Que

convert square millimetres (mm²) to square inches (in²)
one square millimetre (mm²) = 0.0015500031000062 square inches (in²)

convert square millimetres (mm²) to square kilometres (km²)
one square millimetre (mm²) = 0.000000000001 square kilometres (km²)

convert square millimetres (mm²) to square metres (m²)
one square millimetre (mm²) = 0.000001 square metres (m²)

convert square millimetres (mm²) to square miles (mi²)
one square millimetre (mm²) = 0.000000000000386102158542446 square miles (mi²)

convert square millimetres (mm²) to square yards (yd²)
one square millimetre (mm²) = 0.00000119599004630109 square yards (yd²)

convert square metres (m²) to  U.S. Survey acres (ac) U.S. Survey
one square metre (m²) = 0.000000000247104393046628 U.S. Survey acres (ac) U.S. Survey

convert square metres (m²) to  U.S. Survey square feet (ft²) U.S. Survey
one square metre (m²) = 0.0000107638673611111 U.S. Survey square feet (ft²) U.S. Survey