Online calculator to convert square millimeters to square kilometers (mm2 to km2) with formulas, examples, and tables. Our conversions provide a quick and easy way to convert between Area units.
Conversion Calculator
Enter your value in the conversion calculator below.
Convert mm2 to km2
TIP: If the result of your conversion is 0, try increasing the "Decimals".
Conversion Definitions
The following is a list of definitions relating to conversions between square millimeters and square kilometers.
What is a square millimeter (mm2)?
A square millimeter is a unit of area in the Metric System. The symbol for square millimeter is mm2. There are 1,000,000,000,000 square millimeters in a square kilometer. A square millimeter is calculated as the area of a square that has 1 millimeter on each side. The International spelling for this unit is square millimetre.
What is a square kilometer (km2)?
A square kilometer is a unit of area in the Metric System. The symbol for square kilometer is km2. There are 0.000000000001 square kilometers in a square millimeter. A square kilometer is calculated as the area of a square that has 1 kilometer on each side. The International spelling for this unit is square kilometre.
Conversion Formula
Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.
The formula to convert from mm2 to km2 is:
km2 = mm2 ÷ 1,000,000,000,000
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from square millimeters to square kilometers (mm2 to km2).
Square Millimeter to Square Kilometer Conversion Example
Task: Convert 75,000,000,000 square millimeters to square kilometers (show work) Formula: mm2 ÷ 1,000,000,000,000 = km2 Calculations: 75,000,000,000 mm2 ÷ 1,000,000,000,000 = 0.075 km2 Result: 75,000,000,000 mm2 is equal to 0.075 km2
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from mm2 to km2.
Square Millimeters to Square Kilometers Conversion Chart
| square millimeters (mm2) | square kilometers (km2) |
|---|---|
| 10,000 mm2 | 0.00000001 km2 |
| 25,000 mm2 | 0.000000025 km2 |
| 50,000 mm2 | 0.00000005 km2 |
| 75,000 mm2 | 0.000000075 km2 |
| 100,000 mm2 | 0.0000001 km2 |
| 250,000 mm2 | 0.00000025 km2 |
| 500,000 mm2 | 0.0000005 km2 |
| 750,000 mm2 | 0.00000075 km2 |
| 1,000,000 mm2 | 0.000001 km2 |
| 2,500,000 mm2 | 0.0000025 km2 |
| 5,000,000 mm2 | 0.000005 km2 |
| 7,500,000 mm2 | 0.0000075 km2 |
| 10,000,000 mm2 | 0.00001 km2 |
| 25,000,000 mm2 | 0.000025 km2 |
| 50,000,000 mm2 | 0.00005 km2 |
| 75,000,000 mm2 | 0.000075 km2 |
| 100,000,000 mm2 | 0.0001 km2 |
| 250,000,000 mm2 | 0.00025 km2 |
| 500,000,000 mm2 | 0.0005 km2 |
| 750,000,000 mm2 | 0.00075 km2 |
| 1,000,000,000 mm2 | 0.001 km2 |
| 2,500,000,000 mm2 | 0.0025 km2 |
| 5,000,000,000 mm2 | 0.005 km2 |
| 7,500,000,000 mm2 | 0.0075 km2 |
| 10,000,000,000 mm2 | 0.01 km2 |
| 25,000,000,000 mm2 | 0.025 km2 |
| 50,000,000,000 mm2 | 0.05 km2 |
| 75,000,000,000 mm2 | 0.075 km2 |
| 100,000,000,000 mm2 | 0.1 km2 |
Related Units
This table provides a summary of the Area units within their respective measurement systems.
| Unit | Symbol | Measurement System |
|---|---|---|
| square inches | in2 or sq in | US Customary Units/Imperial System |
| square feet | ft2 or sq ft | US Customary Units/Imperial System |
| square yards | yd2 or sq yd | US Customary Units/Imperial System |
| acres | ac | US Customary Units/Imperial System |
| square miles | mi2 or sq mi | US Customary Units/Imperial System |
| square millimeters | mm2 | Metric System |
| square centimeters | cm2 | Metric System |
| square decimeters | dm2 | Metric System |
| square meters | m2 | Metric System |
| square decameters | dam2 | Metric System |
| square hectometers | hm2 | Metric System |
| hectares | ha | Metric System |
| square kilometers | km2 | Metric System |
Note: For area conversions, US Customary Units and the Imperial System are equivalent.
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