Metric Conversion Guide
for the Roofer
B
A P P E N D I X
531
A
p
p
B
_
S
c
h
a
r
f
f
9
/
2
1
/
0
0
1
1
:
2
9
A
M
P
a
g
e
5
3
1
Property
To convert from
Symbol
Application rate
U.S. gallon per square
gal (U.S.)/100 ft2
U.K. gallon per square
gal (U.K.)/100 ft2
Area
square inch
in.2
square foot
ft2
square
100 ft2
Breaking strength
pound force per inch width
lbf/in.
Coverage
square foot per U.S. gallon
ft2/gal
square foot per U.K. gallon
ft2/gal
Density, or mass
pound per cubic foot
lb/ft3
per unit volume
Energy or work
kilowatt-hour
kWh
British thermal unit
Btu
Flow, or volume
U.S. gallon per minute
gpm
per unit time
U.K. gallon per minute
gpm
Force
pound force
lbf
kilogram force
kgf
Heat flow
thermal conductance, C
Btu/hft2°F
thermal conductivity, k
Btuin./hft2°F
Incline
inch per foot
in./ft
Length, width,
mil
0.001 in.
thickness
inch (up to 48 in.)
in.
foot (4 ft and above)
ft
*Exact conversion factor.
532 APPENDIX B
A
p
p
B
_
S
c
h
a
r
f
f
9
/
2
1
/
0
0
1
1
:
2
9
A
M
P
a
g
e
5
3
2
METRIC CONVERSION GUIDE FOR THE ROOFER 533
to
Symbol
Multiply by
Remarks
liter per square
L/m2
0.4075
0.4075 mm thick
meter
liter per square
L/m2
0.4893
0.4893 mm thick
meter
square millimeter
mm2
645.2
1,000,000 mm2 1 m2
square meter
m2
0.09290
square meter
m2
9.290
kilonewton per
kN/m
0.175
meter width
square meter
m2/L
0.02454
per liter
square meter
m2/L
0.02044
per liter
kilogram per
kg/m3
16.02
water 1000 kg/m3
cubic meter
megajoule
MJ
3.600*
J Ws Nm
joule
J
1055
cubic centimeter
cm3/s
63.09
or 0.0631 L/s
per second
cubic centimeter
cm3/s
75.77
or 0.0758 L/s
per second
newton
N
4.4448
N kgm/s2
newton
N
9.807
watt per square
W/m2K
5.678
meter kelvin
watt per meter
W/mK
0.1442
kelvin
percent
%
8.333
3 in./ft 25%
micrometer
m
25.40*
1000 m 1 mm
millimeter
mm
25.40*
1000 mm 1 m
meter
m
0.3048*
A
p
p
B
_
S
c
h
a
r
f
f
9
/
2
1
/
0
0
1
1
:
2
9
A
M
P
a
g
e
5
3
3
Property
To convert from
Symbol
Mass (weight)
ounce
oz
pound
lb
short ton
2000 lb
Ma