Unit Converter › Area › mm² → km²
Area · scale · base square metre
mm² to km²
1 square millimetre (mm²) = 1.000000e-12 km². Multiply by 1.000000e-12. One square millimetre (mm²) is 1.000000e-12 km².
Convert
scale · base square metre
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| Every unit at once | Value | Unit |
|---|
mm² to km² table
| square millimetre (mm²) | km² | Unit |
|---|---|---|
| 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 |
| 25 mm² | 2.500000e-11 | km² |
| 50 mm² | 5.000000e-11 | km² |
| 100 mm² | 1.000000e-10 | km² |
| 500 mm² | 5.000000e-10 | km² |
| 1,000 mm² | 1.00000000000e-9 | km² |
the acre is exact
An acre is exactly 4,046.8564224 m², because it is defined from the exact yard. A hectare is exactly 10,000 m² — the two are close but never equal.