**Definitions:**

**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 Meter** (abbreviations: **m4, or m 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 Millimeters to Double Square Meters

*Example: How many double square meters are equivalent to 89.78 double square millimeters?*

As;

1 double square millimeters = 1.0E-12 double square meters

89.78 double square millimeters = Y double square meters

Assuming Y is the answer, and by criss-cross principle;

Y equals 89.78 times 1.0E-12 over 1

(i.e.) Y = 89.78 * 1.0E-12 / 1 = 8.978E-11 double square meters

Answer is: 8.978E-11 double square meters are equivalent to 89.78 double square millimeters.

*Practice Question: Convert the following units into m4:*

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 45.25 mm4

( ii ) 40.21 mm4

( iii ) 34.73 mm4