engineering

Ideal Gas Law Calculator

Solve for P, V, n, or T using PV = nRT with unit conversions for pressure, volume, and temperature

Ideal Gas Law Calculator

PV = nRT  |  R = 8.314 J/(mol·K)

Solving for: Pressure

Use mass-based (PV = mRT/M)
mol

Pressure P

101383 Pa

Formula

P = nRT/V = 1.0000 × 8.314 × 273.15 / 2.2400e-2

= 101383 Pa

How to Use This Calculator

1

Select the unknown

Choose which variable you want to solve for: Pressure (P), Volume (V), Amount (n), or Temperature (T).

2

Enter the known values

Fill in the three known quantities with their units. Use the dropdowns to select appropriate units for each field.

3

Read the result

The calculator applies PV = nRT and displays the unknown value in your selected output unit.

Formula Reference

Ideal Gas Law

PV = nRT

Variables: P = pressure, V = volume, n = moles of gas, R = universal gas constant (8.314 J/mol·K), T = absolute temperature

When to Use This Calculator

  • •Use the Ideal Gas Law Calculator when solving homework or exam problems that require quick numerical verification of your hand calculations.
  • •Use it during the design phase to rapidly iterate on parameters before running detailed finite element simulations.
  • •Use it when reviewing a colleague's calculation or checking a vendor's data sheet for plausibility.
  • •Use it to generate reference data for a technical report or presentation without manual computation.

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