Ideal Gas Law Calculator

About the Ideal Gas Law Calculator

The Ideal Gas Law Calculator is a convenient online tool for calculating the pressure (P), volume (V), temperature (T), or amount of gas in moles (n) using the well-known gas law equation: PV = nRT, where R is the universal gas constant (8.314 J/(mol·K)). This calculator is widely used in physics, chemistry, and engineering to quickly determine gas properties under varying conditions.

What You Can Calculate

• Pressure (P): Determine the pressure of a gas when volume, temperature, and moles are known.
• Volume (V): Find the volume a gas occupies under specific pressure, temperature, and quantity.
• Temperature (T): Compute the temperature of a gas based on other properties.
• Moles (n): Calculate the amount of substance in moles for a given gas sample.

Formula Used in the Calculator

The calculator is based on the ideal gas law equation:

• PV = nRT

Where:

• P = pressure of the gas (Pa, kPa, MPa, atm, bar)
• V = volume of the gas (m³, L, mL)
• n = number of moles (mol)
• R = universal gas constant (8.314 J/(mol·K))
• T = temperature (K or °C)

How to Use the Ideal Gas Law Calculator

1. Enter any three known variables: pressure (P), volume (V), temperature (T), or moles (n).
2. Leave the unknown variable blank; the calculator will automatically compute it.
3. Select the appropriate units for each variable from the dropdown menus.
4. The result is displayed instantly, accurately converting units as needed.

Applications of the Ideal Gas Law

• Physics & Chemistry: Determine gas behavior in experiments and theoretical calculations.
• Engineering: Analyze thermodynamic systems, HVAC processes, engines, and compressors.
• Education: Learn relationships between pressure, volume, temperature, and moles of gases.
• Industrial Applications: Predict behavior of gases in chemical reactions, storage tanks, and pipelines.