mm² to km² Converter - Square Millimeter to Square Kilometer

Square Millimeter (mm²) to Square Kilometer (km²)

Direct answer

1 mm² = 1e-12 km²

km² = mm² × 1e-12

Converter

Input

mm²

Result

1e-12km²

km² = mm² × 1e-12

mm² = km² × 1e+12

Example: 10 mm² = 10 × 1e-12 = 1e-11 km².

Express both mm² and km² in the same base unit m² (square meter), then cancel the shared base unit.

1
Rewrite mm² in the base unit
$1 m m^{2} = 0.000001 m^{2}$
2
Rewrite km² in the base unit
$1 k m^{2} = 1, 000, 000 m^{2}$
3
Forward conversion
$1 m m^{2} = \frac{0.000001 m ^{2}}{1 , 000 , 000 m ^{2}} \times 1 k m^{2} = \frac{0.000001}{1 , 000 , 000} k m^{2} = 1 \times 1 0^{- 12} k m^{2}$
4
Reverse conversion
$1 k m^{2} = \frac{1 , 000 , 000 m ^{2}}{0.000001 m ^{2}} \times 1 m m^{2} = \frac{1 , 000 , 000}{0.000001} m m^{2} = 1 \times 1 0^{12} m m^{2}$

1 mm² = 1e-12 km².

10 mm² = 1e-11 km².

100 mm² = 1e-10 km².

Use km² = mm² × 1e-12.

1 km² = 1e+12 mm².

Use the conversion factor and round the result to the precision required by your calculation.