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The tables below have been prepared from the freeware units conversion program "Uconeer" by Katmar Software. These tables contain 188 values for the Universal Gas Constant in the most likely combinations of units. However, the dedicated Gas Constant calculator in Uconeer calculates the value of "R" based on over 900 combinations of units, so if you don't find what you want here please go to the Uconeer main page to read the program description and to download the program (only 500kb). In addition to the Universal Gas Constant calculator "Uconeer" contains 370 unit conversions in 42 categories, covering all the standard categories as well as those of particular interest to engineers and scientists. There are also dedicated calculators for viscosity and flowrate conversions, and a calculator for converting feet, inches and fractional inches to and from decimal lengths. |
Gas Constant Values based on Energy Units |
| If you are using kg mol as the unit for quantity of matter then multiply the appropriate value in the g mol column by 1000. |
|
g mol Kelvin |
lb mol Kelvin |
g mol Rankine |
lb mol Rankine |
|
| Btu | 0.0078806 | 3.57458 | 0.00437811 | 1.98588 |
| cal | 1.98588 | 900.779 | 1.10327 | 500.433 |
| Chu | 0.00437811 | 1.98588 | 0.00243228 | 1.10327 |
| erg | 8.31447e+7 | 3.77138e+10 | 4.61915e+7 | 2.09521e+10 |
| ft.lbf | 6.13244 | 2781.63 | 3.40691 | 1545.35 |
| hp.h | 3.09719e-6 | 0.00140486 | 1.72066e-6 | 0.000780479 |
| J | 8.31447 | 3771.38 | 4.61915 | 2095.21 |
| kcal | 0.00198588 | 0.900779 | 0.00110327 | 0.500433 |
| kgf.m | 0.847840 | 384.574 | 0.471022 | 213.652 |
| kJ | 0.00831447 | 3.77138 | 0.00461915 | 2.09521 |
| kW.h | 2.30958e-6 | 0.00104761 | 1.2831e-6 | 0.000582003 |
| N.m | 8.31447 | 3771.38 | 4.61915 | 2095.21 |
Gas Constant Values based on Pressure and Volume Units |
| This table is based on g moles as the unit for quantity of matter and Kelvin as the unit for temperature. If you are using kg mol as the unit for quantity of matter then multiply the value given below by 1000. |
| cm^3 | liter | m^3 | ft^3 | inch^3 | |
| atm | 82.0575 | 0.0820575 | 8.20575e-5 | 0.00289783 | 5.00745 |
| bar | 83.1447 | 0.0831447 | 8.31447e-5 | 0.00293623 | 5.0738 |
| foot H2O | 2781.63 | 2.78163 | 0.00278163 | 0.0982323 | 169.745 |
| inch H2O | 33379.5 | 33.3795 | 0.0333795 | 1.17879 | 2036.94 |
| inch Hg | 2455.27 | 2.45527 | 0.00245527 | 0.086707 | 149.83 |
| kgf/cm^2 | 84.784 | 0.084784 | 8.4784e-5 | 0.00299412 | 5.17384 |
| kPa | 8314.47 | 8.31447 | 0.00831447 | 0.293623 | 507.38 |
| lbf/ft^2 | 173651 | 173.651 | 0.173651 | 6.13244 | 10596.9 |
| mbar | 83144.7 | 83.1447 | 0.0831447 | 2.93623 | 5073.8 |
| meter H2O | 847.84 | 0.84784 | 0.00084784 | 0.0299412 | 51.7384 |
| mm H2O | 847840 | 847.84 | 0.84784 | 29.9412 | 51738.4 |
| mm Hg | 62363.8 | 62.3638 | 0.0623638 | 2.20236 | 3805.68 |
| Pa | 8.31447e+6 | 8314.47 | 8.31447 | 293.623 | 507380 |
| PSI | 1205.91 | 1.20591 | 0.00120591 | 0.0425864 | 73.5893 |
Gas Constant Values based on Pressure and Volume Units |
| This table is based on lb moles as the unit for quantity of matter and Rankine as the unit for temperature. |
| cm^3 | liter | m^3 | ft^3 | inch^3 | |
| atm | 20678.1 | 20.6781 | 0.0206781 | 0.730241 | 1261.86 |
| bar | 20952.1 | 20.9521 | 0.0209521 | 0.739917 | 1278.58 |
| foot H2O | 700958 | 700.958 | 0.700958 | 24.7541 | 42775.1 |
| inch H2O | 8.41150e+6 | 8411.50 | 8.41150 | 297.049 | 513301 |
| inch Hg | 618717 | 618.717 | 0.618717 | 21.8498 | 37756.5 |
| kgf/cm^2 | 21365.2 | 21.3652 | 0.0213652 | 0.754505 | 1303.79 |
| kPa | 2.09521e+6 | 2095.21 | 2.09521 | 73.9917 | 127858 |
| lbf/ft^2 | 4.37594e+7 | 43759.4 | 43.7594 | 1545.35 | 2.67036e+6 |
| mbar | 2.09521e+7 | 20952.1 | 20.9521 | 739.917 | 1.27858e+6 |
| meter H2O | 213652 | 213.652 | 0.213652 | 7.54505 | 13037.9 |
| mm H2O | 2.13652e+8 | 213652 | 213.652 | 7545.05 | 1.30379e+7 |
| mm Hg | 1.57154e+7 | 15715.4 | 15.7154 | 554.985 | 959014 |
| Pa | 2.09521e+9 | 2.09521e+6 | 2095.21 | 73991.7 | 1.27858e+8 |
| PSI | 303885 | 303.885 | 0.303885 | 10.7316 | 18544.2 |