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CHEMISTRY / GASES

Combined Gas Law Calculator

Calculate final pressure for a fixed amount of ideal gas across two states. Inspect the chemical relationship, substituted values, result, assumptions, and unit convention in one guided workspace.

  • 01 Calculated in this tab
  • 02 Values stay in this browser tab
  • 03 Use boundary

Conversion input

Known value

Filter by unit name, symbol, or code. Your current selections remain available.

Equation inputs

Preparing the calculator...

Use boundary

Calculation path

Calculate final pressure for a fixed amount of ideal gas across two states. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.

Calculation path

P_2 = P_1V_1T_2/(T_1V_2)

What you provide

What you provide

  • Initial pressure expressed in atm, using the same scenario as the other inputs
  • Initial volume expressed in L, using the same scenario as the other inputs
  • Initial temperature expressed in K, using the same scenario as the other inputs
  • Final volume expressed in L, using the same scenario as the other inputs
  • Final temperature expressed in K, using the same scenario as the other inputs

What you receive

What you receive

  • Final pressure in atm from the stated equation
  • A symbolic formula plus substituted working with your values
  • Visible assumptions, field guidance, and an authoritative learning reference

Use boundary

Choose the maximum decimal places shown. This does not increase source accuracy.

Gas amount is fixed, temperatures are absolute, and behavior is ideal.

Use internally consistent units and retain extra precision when carrying the result into another calculation.

Reviewed reference factors

Reviewed reference factors

OpenStax Chemistry 2e

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