Ideal Gas Law Calculator

Solve PV = nRT for any unknown variable — pressure, volume, moles, or temperature. Includes isothermal P-V curve visualization.

Solve For

Volume (V)

Moles (n)

mol

Temperature (T)

Tab to move between fields

Result

1.00066

Solved VariablePressure (P)

Pressure1.00066 atm

Pressure101.39 kPa

Volume22.4 L

Moles1 mol

Temperature273.15 K

Temperature0 °C

Molar Density0.04464 mol/L

How to Use This Calculator

Select which variable to solve for (pressure, volume, moles, or temperature).
Enter the known values for the other three variables with appropriate units.
Review the calculated result using the ideal gas law: PV = nRT.
Use this for standard conditions — real gases deviate at high pressure or low temperature.

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Formula

PV = nRT

Calculate the boiling point elevation of a solution from the ebullioscopic constant, molality, and van't Hoff factor.

Calculate osmotic pressure using the van't Hoff equation (π = iMRT). Convert between atm, kPa, mmHg, and psi.

Calculate heat energy (q) from mass, specific heat capacity, and temperature change using the calorimetry equation q = mcΔT.

Calculate product mass from reactant mass using molecular weights and mole ratios. Supports percent yield for practical lab calculations.

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