Gas Conversion Charts
Pressure Equivalents Quick-reference Chart
kPa |
bar |
mb |
atms. |
kg/cm² |
psi |
mm Hg |
Metres H2O @ 20ºC |
1 |
0.010 |
10.000 |
0.010 |
0.010 |
0.145 |
7.501 |
0.102 |
100.000 |
1 |
1,000.000 |
0.987 |
1.020 |
14.504 |
750.063 |
10.216 |
0.100 |
0.001 |
1 |
0.001 |
0.001 |
0.015 |
0.750 |
0.010 |
101.325 |
1.013 |
1,013.250 |
1 |
1.033 |
14.696 |
760.001 |
10.351 |
98.067 |
0.981 |
980.665 |
0.968 |
1 |
14.223 |
735.560 |
10.018 |
6.895 |
0.069 |
68.948 |
0.068 |
0.070 |
1 |
51.715 |
0.704 |
-0.133 |
-0.001 |
-1.333 |
-0.001 |
-0.001 |
-0.019 |
1 |
0.014 |
9.789 |
0.098 |
97.890 |
0.097 |
0.100 |
1.420 |
73.424 |
1 |
Gas Conversion Tables
Cubic Metres Gas @ 15ºC and 101.33 kPa (atmosphere)
Gas |
1 kilogram |
1 tonne |
1 litre |
1 pound |
1 imperial gallon of liquid |
Oxygen |
0.738 |
738 |
0.842 |
0.335 |
3.830 |
Nitrogen |
0.844 |
844 |
0.682 |
0.383 |
3.100 |
Argon |
0.591 |
591 |
0.822 |
0.268 |
3.740 |
Carbon dioxide |
0.535 |
535 |
|
0.243 |
|
Hydrogen |
11.73 |
11730 |
0.831 |
5.320 |
3.770 |
Helium |
5.91 |
5910 |
0.737 |
2.680 |
3.350 |
Methane |
1.471 |
1471 |
0.622 |
0.667 |
2.830 |
Air |
0.816 |
816 |
|
0.370 |
|
Acetylene |
0.901 |
901 |
|
0.408 |
|
Propane |
0.525 |
525 |
0.271* |
0.238 |
1.230* |
Nitrous ooxide |
0.534 |
534 |
|
0.242 |
|
Liquid at 15ºC. Other liquids at 101.33 kPa. Note: 1m³ = 1000 litres
Gas Name and Storage Conditions |
Liquid Volume @ Storage Condition |
Mass |
Gas Volume @ 15ºC & 101.33kPa |
|
Litres |
Kilograms |
Cubic Metres |
Oxygen (O2) -183.0ºC B.Pt @ 101.33kPa
|
1.00 |
1.14 |
0.84 |
0.85 |
1.00 |
0.74 |
1.19 |
1.36 |
1.00 |
Nitrogen (N2) -195.8ºC B.Pt @ 101.33kPa |
1.00 |
0.81 |
0.68 |
1.24 |
1.00 |
0.85 |
1.47 |
1.18 |
1.00 |
Argon (Ar) -185.9ºC B.Pt @ 101.33kPa
|
1.00 |
1.39 |
0.82 |
0.72 |
1.00 |
0.59 |
1.22 |
1.69 |
1.00 |
Carbon dioxide (CO2) -26ºC & 1,500kPa(g): Bulk, refrig, storage
|
1.00 |
1.06 |
0.57 |
0.94 |
1.00 |
0.53 |
1.17 |
1.37 |
1.00 |
Carbon dioxide (CO2) -26ºC & 4,930kPa(g): Bulk, refrig, storage
|
1.00 |
0.82 |
0.44 |
1.21 |
1.00 |
0.53 |
2.27 |
1.87 |
1.00 |
Propane 15ºC & 4,930kPa(g): Cylinders
|
1.00 |
0.51 |
0.27 |
1.96 |
1.00 |
0.53 |
3.65 |
1.88 |
1.00 |