Convert square millimetres (mm²) to square kilometres (km²).
Edit either value. Decimals and scientific notation supported.
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1 mm² ≈ 1e-12 km²
Precision changes displayed rounding, not calculation accuracy.
km² = mm² ÷ 1000000000000km² = mm² ÷ 1000000000000
Divide the mm² reading by 1000000000000.
1 mm² ≈ 1e-12 km²
1 ÷ 1000000000000 ≈ 1e-12
100 mm² ≈ 1e-10 km²
100 ÷ 1000000000000 ≈ 1e-10
Area factors scale with the square of the length factor. For example, 1 ft = 0.3048 m gives 1 ft² = 0.3048² m² = 0.09290304 m².
Fixed reference · Square millimetre to Square kilometre
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
| Square millimetre (mm²) | Square kilometre (km²) |
|---|---|
| 0 | 0 |
| 0.1 | 1e-13 |
| 0.5 | 5e-13 |
| 1 | 1e-12 |
| 2 | 2e-12 |
| 5 | 5e-12 |
| 10 | 1e-11 |
| 25 | 2.5e-11 |
| 50 | 5e-11 |
| 100 | 1e-10 |
| 1000 | 1e-9 |
m · km · cm and more
kg · g · mg and more
m² · km² · cm² and more
L · mL · m³ and more
°C · °F · K and more
m/s · km/h · mph and more
Pa · kPa · MPa and more
J · kJ · MJ and more
W · kW · MW and more
B · b · kB and more
px · pt · pc and more
s · ms · µs and more
° · rad · gon and more
Hz · kHz · MHz and more
N · kN · lbf and more
bit/s · kbit/s · Mbit/s and more
L/100 km · km/L · mpg (US) and more
kg/m³ · g/cm³ · g/L and more
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