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 |