Appendix B- International System of Units (SI) Conversion Factors

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APPENDIX B
INTERNATIONAL SYSTEM OF UNITS (SI) CONVERSION FACTORS
U.S.
INTERNATIONAL
APPROXIMATE
QUANTITY
CUSTOMARY UNIT
(SI) UNIT
CONVERSION
LENGTH
foot(ft)
meter(m)
1 ft
=
0.3048 m
foot(ft)
millimeter(mm)
1 ft
= 304.8 mm
inch(in)
millimeter(mm)
1 in
=  25.4 mm
AREA
square yard(yd2)
square meter(m2)
1 yd2 =
0.836 127 m2
square foot(ft2)
square meter(m2)
1 ft2 =
0.092 903 m2
square inch(in2)
square millimeter(mm2) 1 in2 = 645.16 mm2
VOLUME
cubic yard(yd3)
cubic meter(m3)
1 yd3 =
0.764 555 m3
cubic foot(ft3)
cubic meter(m3)
1 ft3 =
0.028 317 m3
cubic inch(in3)
cubic millimeter(mm3) 1 in3 = 16,387.1 mm3
CAPACITY gallon(gal)
liter(L)
1 gal
=  3.785 41 L
fluid ounce(fl oz)
milliliter(mL)
1 fl oz = 29.5735 mL
VELOCITY, foot per second
meter per second(m/s)
1 ft/s
= 0.3048 m/s
SPEED
(ft/s or f.p.s.)
mile per hour
kilometer per hour
1 mile/h= 1.609 344 km/h
(mile/h or m.p.h.)  (km/h)
ACCELERA-foot per second
meter per second
1 ft/s2 = 0.3048 m/s2
TION
squared(ft/s2)
squared(m/s2)
MASS
short ton(2000lb)
metric ton(t)
1 ton
=
0.907 185 t
(1000 kg)
pound(lb)
kilogram(kg)
1 lb
=  0.453 592 kg
ounce(oz)
gram(g)
1 oz
= 28.3495 g
DENSITY
ton per cubic
metric ton per cubic
1 ton/yd3 =1.186 55
t/m3
yard(ton/yd3)
meter(t/m3)
pound per cubic
kilogram per cubic
1 lb/ft3 =16.0185 kg/m3
foot(lb/ft3)
meter(kg/m3)
FORCE
ton-force(tonf)
kilonewton(kN)
1 tonf
= 8.896 44 kN
kip(1000 lbf)
kilonewton(kN)
1 kip
= 4.448 22 kN
pound-force(lbf)
newton(N)
1 lbf
= 4.448 22 N
MOMENT
ton-force foot
kilonewton
1 tonf.ft = 2.711 64 kN.m
OF FORCE (tonf.ft)
meter(kN.m)
pound-force
newton meter(N.m)
1 lbf.in =
0.112 985 N.m
inch(lbf.in)