🧪 Ideal Gas Law Calculator
Use the ideal gas law (PV = nRT) to solve for pressure, volume, moles, or temperature when you know the other three.
What the ideal gas law describes
The ideal gas law relates the pressure, volume, amount, and temperature of an ideal gas using the equation PV = nRT. It is a foundational relationship in chemistry and physics used to approximate the behavior of many real gases under normal conditions.
How this calculator works
Choose which quantity you want to solve for, then enter the other three values: pressure (in kilopascals), volume (in liters), amount of gas (in moles), and temperature (in kelvin). The calculator rearranges PV = nRT using the universal gas constant R = 8.314 J/(mol·K) to compute the missing quantity, converting units internally as needed.
The ideal gas law assumes gas particles have no volume and no intermolecular forces, so it is most accurate at low pressure and moderate-to-high temperature. Real gases deviate from this model under extreme conditions. This tool is for general educational and planning purposes.