Ideal Gas Law Calculator
Calculate pressure using ideal gas law PV=nRT
About this calculator
The Ideal Gas Law Calculator helps you determine gas pressure using the fundamental equation PV=nRT, where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature. This tool is essential for chemistry students, engineers, and scientists working with gases under ideal conditions. It simplifies complex calculations and ensures accurate results for gas behavior predictions, making it invaluable for laboratory work, industrial processes, and academic studies involving gas dynamics.
How to use
Enter the known values for volume (V), number of moles (n), and temperature (T) in their respective fields. The calculator uses the universal gas constant (R) automatically. Click calculate to determine the pressure (P) of your ideal gas system.
Frequently asked questions
What units should I use for the ideal gas law calculation?
Use consistent units: pressure in atm, volume in liters, temperature in Kelvin, and moles for quantity of gas.
When does the ideal gas law not apply accurately?
The ideal gas law becomes less accurate at very high pressures or very low temperatures where gases behave non-ideally.
What is the value of the gas constant R?
R equals 0.0821 L·atm/(mol·K) when using atmospheres, liters, moles, and Kelvin as standard units.