ChemBench

Avogadro's Law Calculator

More moles, more volume — same ratio.

Equal moles, equal volume

At the same temperature and pressure, equal volumes of any gas contain the same number of moles — this is the basis for why gas volume scales directly and linearly with mole count.

The foundation of molar volume

This law is why '22.4 liters per mole at STP' is a single constant that works for any ideal gas, regardless of what the gas actually is.

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ChemBench

Avogadro's Law Calculator

More moles, more volume — same ratio.

Initial volume (L)

Initial moles

Final moles

Final volume

10 L

V₁/n₁ = V₂/n₂

What you entered

Initial volume (L): 5Initial moles: 1Final moles: 2

1
V₂ = V₁n₂ ÷ n₁
(5 × 2) ÷ 1= 10

Result

Final volume: 10 L

Adding moles to reach 2 total expands the gas to 10L.

Equal moles, equal volume

At the same temperature and pressure, equal volumes of any gas contain the same number of moles — this is the basis for why gas volume scales directly and linearly with mole count.

The foundation of molar volume

This law is why '22.4 liters per mole at STP' is a single constant that works for any ideal gas, regardless of what the gas actually is.