Approximate Conversions From Standard/us Customary Units To Si/metric Units Page 2

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TEMPERATURE
(F-32) x (5/9)
F
Fahrenheit
OR
Celsius
C
o
o
(F-32) ÷ 1.8
ILLUMINATION
fc
foot-candles
10.76
lux
lx
fl
foot-Lamberts
3.426
candela/m
cd/m
2
2
FORCE and PRESSURE or STRESS
lbf
poundforce
4.45
newtons
N
poundforce
lbf/in
6.89
kilopascals
kPa
2
per square inch
These metric conversion tables contain APPROXIMATE factors. Most are NOT
EXACT.
APPROXIMATE CONVERSIONS
FROM
SI / METRIC UNITS
TO
STANDARD / US CUSTOMARY UNITS
TO
SYMBOL
MULTIPLY BY
TO FIND
SYMBOL
CONVERT
LENGTH
mm
millimeters
0.039
inches
in
m
meters
3.28
feet
ft
m
meters
1.09
yards
yd
km
kilometers
0.621
miles
mi
AREA
square
mm
0.0016
square inches
in
2
2
millimeters
m
square meters
10.764
square feet
ft
2
2
m
square meters
1.195
square yards
yd
2
2
ha
hectares
2.47
acres
ac

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