Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Molar mass (g/mol)

Required number input.

Pressure (atm)

Required number input.

Temperature (K)

Required number input.

Compute ideal gas density in g/L as molar mass times pressure over R times temperature using the gas constant in L-atm. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Density (g/L)

The resulting density returned as a number.

• Simple gas relationships often assume equilibrium and ideal-gas behavior. High pressure, low temperature, condensation, composition changes, and nonzero compressibility can require a real-gas equation of state.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Boyle's Law Calculator

  Compute the final pressure of a gas at constant temperature as initial pressure times initial volume over final volume.

• Charles's Law Calculator

  Compute the final volume of a gas at constant pressure as initial volume times final temperature over initial temperature in Kelvin.

• Gay-Lussac Law Calculator

  Compute the final pressure of a gas at constant volume as initial pressure times final temperature over initial temperature in Kelvin.