Chemistry Calculator Gas Laws With Steps

Gas Laws Calculator with Steps

Use this gas laws calculator to solve Boyle’s Law, Charles’s Law, Gay-Lussac’s Law, the Combined Gas Law, and the Ideal Gas Law. Choose a law, select the variable you want to solve for, enter the known values, and get a step-by-step solution.

Calculate Gas Law Problems

Choose a gas law

Solve for

Result:

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Worked Example: Boyle’s Law

Gas Law Formulas

Gas laws describe the relationships among pressure, volume, temperature, and amount of gas. They are commonly used in chemistry labs, stoichiometry problems, and gas behaviour investigations.

Boyle’s Law: P₁V₁ = P₂V₂
Charles’s Law: V₁/T₁ = V₂/T₂
Gay-Lussac’s Law: P₁/T₁ = P₂/T₂
Combined Gas Law: P₁V₁/T₁ = P₂V₂/T₂
Ideal Gas Law: PV = nRT

Temperature must be in Kelvin for gas law calculations. If a temperature is given in Celsius, this calculator can convert it automatically.

Practice Question

A gas has a volume of 3.0 L at 300 K. What is the volume at 600 K if pressure stays constant?

Your answer in L

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Worksheet Connection

Use this calculator with gas laws worksheets, chemistry practice questions, virtual lab activities, and Grade 11–12 chemistry lessons.

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Student Tip

For gas law problems, always check your units first. Temperature must be in Kelvin, and pressure and volume units should be consistent across the equation.

Kelvin = °C + 273.15