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 APPENDIX W
CONVERSION FACTORS FOR THE MOST COMMON UNITS USED IN BUILDING
DESIGN AND CONSTRUCTION
Where appropriate, conversion factors are taken
to
six
significant
figures. Underlined values denote exact conversions.
Metric to Customary
LENGTH
1 km
=
0.621.371
mile (international)
=
49.7096
chain
1m
=
1.093 61
yd
=
3.280 84
ft
1 mm
=
0.039 370 1
in
Customary to Metric
LENGTH
1
mile (international)
=
1.609 344
km
1
chain (survey unit)
=
20.1168
m
1
yd
=
0.9144
m
1
ft
=
0.3048
m
=
304.8
mm
1 in
=
25.4
mm
(1 U.S. survey foot
= 0.304 800 6
m)
Metric to Customary
AREA
1 km2
mile2 (U.S. survey)
= 0.386
101
1 ha
=
2.471 04
acre (U.S. survey)
1 m2
yd2
=
1.195 99
ft2
=
10.7639
1 mm2
in2
= 0.001
550
Customary to Metric
AREA
1 mile2 (U.S. survey)
km2
= 2.590 00
1 acre (U.S. survey)
= 0.404 687
ha
m2
= 4046.87
1 yd2
m2
= 0.836 127
1 ft2
m2
= 0.092 903
1 in2
mm2
= 645.16
W-1
APPENDIX W
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