Welcome to my square millimeters to square kilometers converter, also known as the mm² to km² converter.
Use the form below to convert square millimeters (mm²) into square kilometers (km²) and if you want to read an explanation of how to convert square millimeters to square kilometers with step-by-step instruction just click the "Explain" button.
You can also check the Quick Conversions box in the right menu for some preset calculations that are commonly searched for.
All Area Unit Converters
The list below contains links to all of our area unit converters.