# Convert moles to liters and liters to moles

This online calculator converts moles to liters of gas and liters of gas to moles at STP (standard temperature and pressure).

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The moles to liters/liters to moles conversion is straightforward and is based on the fact that the ideal gas equation is a good approximation for many common gases at standard temperature and pressure. Thus, we can rearrange terms in the ideal gas equation and write them like this . The relation is the molar volume .

Hence, for a given temperature and pressure, the molar volume is the same for all ideal gases and is known to the same precision as the gas constant: R = 0.082 057 338(47) L atm K−1 mol−1, that is a relative standard uncertainty of 5.7×10−7, according to the 2014 CODATA recommended value^{1}

The molar volume of an ideal gas at standard temperature and pressure (273.15 K, 101.325 kPa) is 22.413 962 x 10-3 m3 mol-1 with a standard uncertainty of 0.000013 x 10-3 m3 mol-1^{2}

The calculator below uses the formula to convert liters to moles and to convert moles to liters, where is 22.413962

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