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Gas law library

Explore gas laws and calculators

Choose a calculator based on the variables in your problem. Each calculator provides a formula and a worked solution.

CORE GAS LAW

Combined Gas Law Calculator

Calculate changes in pressure, volume, and temperature for a fixed amount of gas.

P₁V₁/T₁ = P₂V₂/T₂
Open calculator →CORE GAS LAW

Ideal Gas Law Calculator

Relate pressure, volume, temperature, and the amount of an ideal gas.

PV = nRT
Open calculator →CORE GAS LAW

Boyle's Law Calculator

Find how pressure changes when gas volume changes at constant temperature.

P₁V₁ = P₂V₂
Open calculator →CORE GAS LAW

Charles's Law Calculator

Calculate gas volume changes caused by temperature changes at constant pressure.

V₁/T₁ = V₂/T₂
Open calculator →CORE GAS LAW

Gay-Lussac's Law Calculator

Calculate pressure changes caused by temperature changes at constant volume.

P₁/T₁ = P₂/T₂
Open calculator →SPECIALIST TOOL

Ideal Gas Density Calculator

Estimate ideal-gas density using pressure, molar mass, and absolute temperature.

ρ = PM/RT
Open calculator →SPECIALIST TOOL

Ideal Gas Mass Calculator

Calculate gas mass from pressure, volume, molar mass, and temperature.

m = PVM/RT
Open calculator →SPECIALIST TOOL

Ideal Gas Molar Mass Calculator

Find the molar mass of a gas from its measured state and sample mass.

M = mRT/PV
Open calculator →SPECIALIST TOOL

Ideal Gas Law Calculator in English Units

Work with common English-unit pressure and volume measurements.

PV = nRT
Open calculator →
Before calculating: Gas-law temperature ratios require Kelvin. Use absolute pressure, keep pressure and volume units consistent, and check the assumptions of the selected law.