# Convert Millimeter Square to Kilometer Square (mm2 to km2)

In next fields, kindly type your value in the text box under title [ From: ] to convert from millimeter square to kilometer square (mm2 to km2). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].

**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.

**Kilometer Square** (abbreviation: **km2**): is the SI derived unit of area. It is the area of a square whose sides measure exactly one kilometre. The square metre 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 * 1000 of a second.

## How to Convert Millimeters Square to Kilometers Square

*Example: How many kilometers square are equivalent to 67.42 millimeters square?*

As;

1 millimeters square = 1.0E-12 kilometers square

67.42 millimeters square = Y kilometers square

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

Y equals 67.42 times 1.0E-12 over 1

(i.e.) Y = 67.42 * 1.0E-12 / 1 = 6.742E-11 kilometers square

Answer is: 6.742E-11 kilometers square are equivalent to 67.42 millimeters square.

*Practice Question: Convert the following units into km2:*

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

( i ) 66.83 mm2

( ii ) 75.4 mm2

( iii ) 37.87 mm2