Liters to Moles Calculator

Convert liters of gas to moles using the ideal gas law (PV = nRT) or STP conditions (22.414 L/mol).

L

MOLES

1 mol

MOLECULES

6.0221e+23

FORMULA

n = V / 22.414

💡 How to Convert Liters to Moles

What Is Molar Volume?

At Standard Temperature and Pressure (STP — 0°C and 1 atm), one mole of any ideal gas occupies exactly 22.414 liters. This value is called the molar volume and is the same regardless of which gas you are measuring, because at low pressures, gas behavior depends only on the number of molecules, not their chemical identity.

How to Convert Liters to Moles

At STP (Standard Temperature and Pressure)

n = V / 22.414

For example, 44.828 liters of oxygen at STP is: n = 44.828 / 22.414 = 2.0 moles of O₂.

Using the Ideal Gas Law

For conditions other than STP, use the ideal gas law:

n = PV / RT

Where P = pressure (atm), V = volume (L), R = 0.08206 L⋅atm/(mol⋅K), and T = temperature (K). You can then convert moles to grams using molar mass.

🔗 Related Calculators

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