Double Square Inch (abbreviations: in4, or in 4): is a unit in the (British) imperial and United States customary systems of measurement 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 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.
How to Convert Double Square Inches to Double Square Millimeters
Example: How many double square millimeters are equivalent to 20.68 double square inches?
As;
1 double square inches = 416231.4256 double square millimeters
20.68 double square inches = Y double square millimeters
Assuming Y is the answer, and by criss-cross principle;
Y equals 20.68 times 416231.4256 over 1
(i.e.) Y = 20.68 * 416231.4256 / 1 = 8607665.881408 double square millimeters
Answer is: 8607665.881408 double square millimeters are equivalent to 20.68 double square inches.
Practice Question: Convert the following units into mm4:
N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.
( i ) 66.83 in4
( ii ) 61.74 in4
( iii ) 88.62 in4
