Double Square Millimeter (abbreviations: mm4, or mm 4): is the SI derived unit of area moment of inertia, a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis.
Double Square Foot (abbreviation: ft4): is an imperial unit and U.S. customary unit (non-SI, non-metric) of area moment of inertia, a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis.
How to Convert Double Square Millimeters to Double Square Feet
Example: How many double square feet are equivalent to 89.89 double square millimeters?
As;
1 double square millimeters = 1.1588438533152E-10 double square feet
89.89 double square millimeters = Y double square feet
Assuming Y is the answer, and by criss-cross principle;
Y equals 89.89 times 1.1588438533152E-10 over 1
(i.e.) Y = 89.89 * 1.1588438533152E-10 / 1 = 1.041684739745E-8 double square feet
Answer is: 1.041684739745E-8 double square feet are equivalent to 89.89 double square millimeters.
Practice Question: Convert the following units into ft4:
N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.
( i ) 47.96 mm4
( ii ) 72.41 mm4
( iii ) 19.19 mm4
