This Gay-Lussac’s Law calculator helps you determine the pressure or temperature change of a gas when its volume is held constant.

## Gay-Lussac’s Law Calculator

Use this calculator to find the final pressure of a gas when it’s heated or cooled, based on Gay-Lussac’s Law. Simply enter the initial pressure and temperature, along with the final temperature, and get the calculated final pressure instantly.

### How to Use the Calculator

- Enter the initial pressure of the gas in atmospheres (atm) into the first field.
- Input the initial temperature of the gas in Kelvin (K) into the second field.
- Input the final temperature of the gas in Kelvin (K) into the third field.
- Click the “Calculate” button to see the result in the final pressure field.

### How it Calculates the Results

The calculator uses Gay-Lussac’s Law formula which states that the pressure of a gas is directly proportional to its temperature in kelvins, provided the volume remains constant. The formula used is:

**P₂ = P₁ * (T₂ / T₁)**

where:

**P₁**– Initial Pressure**T₁**– Initial Temperature in Kelvin**T₂**– Final Temperature in Kelvin**P₂**– Final Pressure calculated

### Limitations

The Gay-Lussac’s Law Calculator assumes that there is no change in the volume of the gas and no gas particles have been added or removed. It’s important to note that the temperatures must be in Kelvin for the calculation to be accurate. The calculator also doesn’t take into account the effects of changes in atmospheric pressure or potential phase changes of the gas if the temperature changes significantly.