**Definitions:**

**Millimeter Square** (abbreviation: **mm2**): is the SI derived unit of area. It is the area of a square whose sides measure exactly one millimeter. The square millimeter is derived from the SI base unit of the metre, which itself is the length of the path travelled by light in absolute vacuum within time interval of 1/299,792,458 * 1/1000 of a second.

**Foot Square** (abbreviations: **ft2, or sf, or sq ft**): (plural square feet) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area.

## How to Convert Millimeters Square to Feet Square

*Example: How many feet square are equivalent to 40 millimeters square?*

As;

1 millimeters square = 1.1E-5 feet square

40 millimeters square = Y feet square

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

Y equals 40 times 1.1E-5 over 1

(i.e.) Y = 40 * 1.1E-5 / 1 = 0.00044 feet square

Answer is: 0.00044 feet square are equivalent to 40 millimeters square.

*Practice Question: Convert the following units into ft2:*

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

( i ) 29.91 mm2

( ii ) 9.06 mm2

( iii ) 62.15 mm2