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CHEMISTRY / QUANTITATIVE CHEMISTRY

Combined Gas Law Pressure Calculator

Calculate final pressure for a fixed gas amount. Review the equation, substituted values, result, assumptions, and interpretation 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 gas amount. 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

P2=P1V1T2/(T1V2)

What you provide

What you provide

  • Initial pressure, using the same scenario as the other inputs
  • Initial volume, using the same scenario as the other inputs
  • Initial temperature, using the same scenario as the other inputs
  • Final volume, using the same scenario as the other inputs
  • Final temperature, 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.

This calculation is not a laboratory procedure; verify identity, purity, units, hazards, and conditions.

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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