Convert Double Square Millimeter to Double Square Foot (mm4 to ft4)

In next fields, kindly type your value in the text box under title [ From: ] to convert from double square millimeter to double square foot (mm4 to ft4). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].

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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 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 84.78 double square millimeters?


As;

1 double square millimeters = 1.1588438533152E-10 double square feet

84.78 double square millimeters = Y double square feet

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

Y equals 84.78 times 1.1588438533152E-10 over 1

(i.e.) Y = 84.78 * 1.1588438533152E-10 / 1 = 9.8246781884064E-9 double square feet

Answer is: 9.8246781884064E-9 double square feet are equivalent to 84.78 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 ) 67.87 mm4

( ii ) 21.03 mm4

( iii ) 25.08 mm4



References
  • Wikipedia
  • USMA
  • NIST

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