Specialty Gas Equipment
Conversion Tables and Dew Points
Density (Mass/Volume)
g/ml
g/ml
kg/m3
lb/ft3
lb/gal
lb/in3
kg/m3
103
10-3
1.6018 x 10-2
1.1983 x 10-1
2.7680 x 101
lb/ft3
101
6.2428 x
6.2428 x 10-2
1.6018 x 101
1.1983 x 102
2.7680 x 104
7.4805
1.7280 x 103
lb/gal
lb/in3
8.3454
8.3454 x 10-3
1.3368 x 10-1
3.6127 x 10-2
3.6127 x 10-5
5.7870 x 10-4
4.3290 x 10-3
2.3100 x 102
To convert a value from the units listed in
the vertical column at the left of the table
to the units given in the top row, multiply
the left hand value by the conversion
factor given at the intersection.
Mass
g
g
kg
lb
ton (short)
103
4.5359 x 102
9.0718 x 105
kg
lb
ton (short)
10-3
2.2046 x 10-3
2.2046
1.1023 x 10-6
1.1023 x 10-3
5.0 x 10-4
4.5359 x 10-1
9.0718 x 102
Parts Per Million (ppm)
to Percent (%):
1 ppm = 0.0001%
10 ppm = 0.001%1
100 ppm = 0.01%111
1,000 ppm = 0.1%111111
10,000 ppm = 1.0%1111111
2.0 x 103
Volume
liter
liter
m3
cm3 (ml)
ft3
US gal
103
10-3
2.8317 x 101
3.7854
m3
cm3 (ml)
ft3
US gal
10-3
103
106
3.5315 x 10-2
3.5315 x 101
3.5315 x 10-5
2.6418 x 10-1
2.6418 x 102
2.6418 x 10-4
7.4801
10-6
2.8317 x 10-2
3.7854 x 10-3
104
2.8317 x
3.7854 x 103
Parts Per Million (ppm)
to Parts Per Billion (ppb):
1 ppm = 1,000 ppb
0.1 ppm = 100 ppb
0.01 ppm = 10 ppb
0.001 ppm = 1 ppb
1.3368 x 10-1
Temperature
°C
°C
°F
K
(°F - 32) ÷ 1.8
K – 273.15
°F
K
1.8 (°C) + 32
°C + 273.15
(°F + 459.67) ÷ 1.8
1.8 (K) – 459.67
Pressure
atm
atm
psi (lb/in2)
in of Hg (32°F)
mm of Hg (32°F) (torr)
in of H2O (60°F)
kPa
bar
6.8046 x 10-2
3.3421 x 10-2
1.3158 x 10-3
2.4582 x 10-3
9.8692 x 10-3
9.8692 x 10-1
psi (lb/in2)
in of Hg (32°F)
mm of Hg (32°F) (torr)
in of H2O (60°F)
kPa
bar
1.4696 x 101
2.9921 x 101
2.0360
7.60 x 102
5.1715 x 101
2.54 x 101
4.0719 x 102
2.7707 x 101
1.3608 x 101
5.3576 x 10-1
1.01325 x 102
6.8948
3.3864
1.3332 x 10-1
2.4884 x 10-1
1.01325
6.8948 x 10-2
3.3864 x 10-2
1.3332 x 10-3
2.4884 x 10-3
10-2
4.9115 x 10-1
1.9337 x 10-2
3.6092 x 10-2
1.4504 x 10-1
1.4504 x 101
3.9370 x 10-2
7.3484 x 10-2
2.9530 x 10-1
2.9530 x 101
1.8665
7.5008
7.5008 x 102
4.0186
4.0186 x 102
102
Dew Point-Water Vapor Content
Dew Point at 1 atm
ºF (ºC)
Water Vapor
ppm (vol/vol)
Dew Point at 1 atm
ºF (ºC)
Water Vapor
ppm (vol/vol)
Dew Point at 1 atm
ºF (ºC)
Water Vapor
ppm (vol/vol)
–130 (–90)
–120 (–84)
–110 (–79)
–105 (–76)
–104 (–76)
–103 (–75)
–102 (–74)
–101 (–74)
–100 (–73)
–99 (–73)
–98 (–72)
–97 (–72)
–96 (–71)
–95 (–71)
–94 (–70)
–93 (–69)
–92 (–69)
–91 (–68)
–90 (–68)
–89 (–67)
–88 (–67)
0.10
0.25
0.63
1.00
1.08
1.18
1.29
1.40
1.53
1.66
1.81
1.96
2.15
2.35
2.54
2.76
3.00
3.28
3.53
3.84
4.15
–87 (–66)
–86 (–66)
–85 (–65)
–84 (–64)
–83 (–64)
–82 (–63)
–81 (–63)
–80 (–62)
–79 (–62)
–78 (–61)
–77 (–61)
–76 (–60)
–75 (–59)
–74 (–59)
–73 (–58)
–72 (–58)
–71 (–57)
–70 (–57)
–69 (–56)
–68 (–56)
–67 (–55)
1 4.50
1 4.78
15.3
15.7
16.2
16.6
17.2
17.8
18.4
19.1
19.8
10.5
11.4
12.3
13.3
14.3
15.4
16.6
17.9
19.2
20.6
–66 (–54)
–65 (–54)
–64 (–53)
–63 (–53)
–62 (–52)
–61 (–52)
–60 (–51)
–59 (–51)
–58 (–50)
–57 (–49)
–56 (–49)
–55 (–48)
–54 (–48)
–53 (–47)
–52 (–47)
–51 (–46)
–50 (–46)
–49 (–45)
–48 (–44)
–47 (–44)
–46 (–43)
22.1
23.6
25.6
27.5
29.4
31.7
34.0
36.5
39.0
41.8
44.6
48.0
51.0
55.0
59.0
62.0
67.0
72.0
76.0
82.0
87.0