Square Millimeters to Square Kilometers

Convert square millimeters (mm²) to square kilometers (km²) with formulas, examples, and conversion tables.

mm²
km²
1 square millimeters (mm²) = 1e-12 square kilometers (km²)
Round to:
Step-by-Step Solution
1Write the conversion factor:
1 square kilometer = 1e12 square millimeters
2Divide the value by the conversion factor:
1 ÷ 1e12 = 1e-12
3Result:
1 square millimeters (mm²) = 1e-12 square kilometers (km²)

How to Convert square millimeters to square kilometers

To convert square millimeters to square kilometers, divide the value by 1e12.

The Formula

square kilometers = square millimeters ÷ 1e12

Key Fact

1 square kilometer = 1e12 square millimeters

Tip: To convert square kilometers back to square millimeters, multiply by 1e12.

square millimeters to square kilometers Table

square millimeterssquare kilometers
1 mm²1e-12 km²
2 mm²2e-12 km²
5 mm²5e-12 km²
10 mm²1e-11 km²
20 mm²2e-11 km²
25 mm²2.5e-11 km²
50 mm²5e-11 km²
100 mm²1e-10 km²
250 mm²2.5e-10 km²
500 mm²5e-10 km²
1000 mm²1e-9 km²

1 square millimeter in Other Units

Unit1 mm² =
Square Millimeters to Square Kilometers1e-12 km²
Square Millimeters to Hectares1e-10 ha
Square Millimeters to Square Meters1e-6
Square Millimeters to Square Centimeters0.01 cm²
Square Millimeters to Square Miles3.86102158593e-13 mi²
Square Millimeters to Acres2.47105163015e-10 ac
Square Millimeters to Square Yards1.19599056124e-6 yd²
Square Millimeters to Square Feet1.07639150512e-5 ft²
Square Millimeters to Square Inches0.00155000310001 in²
Square Millimeters to Ares1e-8 a
Square Millimeters to Barns1e22 b

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