# Values of the Universal Gas Constant "R" in various units

The tables below have been prepared from the professional units conversion program Uconeer by Katmar Software. These tables contain 188 values for the Universal Gas Constant in the most likely combinations of units. These include the most commonly used values for the universal gas constant when working in metric units, SI units, English engineering units and US customary 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. Uconeer will even allow you to add your own units, so if you do not find the units you need in the tables below, or built into Uconeer, you can add them in for yourself.

In addition to the Universal Gas Constant calculator, Uconeer includes a gas flowrate converter which will calculate gas density and convert between volume and mass. Uconeer contains over 450 units in 48 categories, and includes several other special converters and calculators.

### 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 molKelvin lb molKelvin g molRankine lb molRankine 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 (dyn.cm) 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
Copyright (C) Katmar Software 2001-2024

### 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 84.7840 0.0847840 8.47840e-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 847.840 0.847840 0.00084784 0.0299412 51.7384 mm H2O 847840 847.840 0.847840 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
Copyright (C) Katmar Software 2001-2024

### 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
Copyright (C) Katmar Software 2001-2024