Welcome to my square miles to square millimeters converter, also known as the mi² to mm² converter.
Use the form below to convert square miles (mi²) into square millimeters (mm²) and if you want to read an explanation of how to convert square miles to square millimeters 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.