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Moles to Liters at STP Converter
↔ Convert L (STP) to mol instead

Common Conversions

mol L (STP)
0.01 0.224
0.05 1.121
0.1 2.241
0.25 5.604
0.5 11.207
1 22.414
2 44.828
3 67.242
5 112.07
10 224.14
44.615 1000

Why this conversion matters in chemistry

Gas stoichiometry exits through this conversion. A zinc-acid metathesis producing 0.250 mol of H₂ generates 5.60 L of gas at the old-IUPAC STP point (0 °C, 1 atm) — the predicted volume displaced at a water-trough collection setup. Watch the STP definition: pre-1982 textbooks used 1 atm and 22.414 L/mol; the modern IUPAC reference is 1 bar and 22.711 L/mol. Cross-check which convention a problem statement uses before substituting. itself is PV = nRT for an ideal gas at the chosen reference point, simplified.

Formula

L = mol × 22.414 (at 0°C, 1 atm)

Worked Examples

1 mol = 22.414 L

The conversion anchor — molar volume of an ideal gas at old-IUPAC STP.

0.5 mol = 11.207 L

Half a mole of gas — about a typical small-scale evolution amount.

2 mol = 44.828 L

Two moles — about a typical larger preparative gas-evolution scale.

0.1 mol = 2.2414 L

100 mmol — about a typical bench-scale evolved-gas measurement.

Frequently Asked Questions

What is the molar volume at STP?
At old-IUPAC STP (0 °C = 273.15 K, 1 atm), one mole of an ideal gas occupies 22.414 L. The figure drops out of PV = nRT at the reference conditions.
Does this work for all gases?
It's exact for an ideal gas. Real gases deviate slightly: at STP, CO₂ is about 22.26 L/mol and H₂ is about 22.43 L/mol. For high-precision work, use real-gas equations of state instead of the ideal approximation.
What about the modern IUPAC STP?
IUPAC redefined STP as 0 °C and 1 bar (not 1 atm) in 1982. At those conditions, molar volume is 22.711 L/mol. Many textbooks still use the old 1 atm convention; check before plugging numbers in.
How do I calculate volume at non-STP conditions?
Use PV = nRT directly. At 25 °C and 1 atm: V = nRT/P = 1 × 0.08206 × 298.15 / 1 = 24.47 L/mol. The factor scales with temperature and inversely with pressure.