mm² to km²
39 unitsResult1.000000e-12
1.000000e-12km²
1 mm² × 1.000000e-12 = 1.000000e-12 km²
Convert Square millimeter to Square kilometer (mm² to km²)
1 square millimeter = 1.000000e-12 square kilometers. Convert square millimeters to square kilometers instantly, with the exact factor, the formula and a reference table of common values.
Formula
square kilometers = square millimeters × 1.000000e-12
mm² to km² conversion table
| mm² | km² |
|---|---|
| 1 mm² | 1.000000e-12 km² |
| 2 mm² | 2.000000e-12 km² |
| 3 mm² | 3.000000e-12 km² |
| 5 mm² | 5.000000e-12 km² |
| 10 mm² | 1.000000e-11 km² |
| 20 mm² | 2.000000e-11 km² |
| 50 mm² | 5.000000e-11 km² |
| 100 mm² | 1.000000e-10 km² |
| 250 mm² | 2.500000e-10 km² |
| 500 mm² | 5.000000e-10 km² |
| 1000 mm² | 1.000000e-9 km² |
What is a square millimeter?
A square millimeter is a tiny square one millimeter on each side; a million of them make one square meter. It is about the size of a pinhead.
Engineers and machinists use it for wire cross-sections, small components and tolerances, and biologists use it under the microscope.
In writing, the square millimeter is usually shortened to "mm²". One square millimeter is 0.000001 square meters, and that ratio is what every number on this page is built from.