Square Kilometre
Square kilometre
(
U.S.
spelling: Square kilometer), symbol
km
, is an
SI
unit
of
surface area
. It is one of the
SI derived units
. 1 km is equal to:
the area of a
square
measuring 1
kilometre
on each side
1 000 000
m
2
100
hectares
0.386 102
square miles
(statute)
247.105 381
acres
Conversely:
1 m = 0.000 001 km
2
1 hectare = 0.01 km
2
1
square mile
= 2.589 988 km
2
1 acre = 0.004 047 km
2
The
1 E6 m
orders of magnitude
page gives comparisons with geographic areas.
hectare
square kilometre
square megametre
See also
Conversion of units
.
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