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Ideal Gas Law Calculator

Chemistry
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Calculates pressure, volume, number of moles, or temperature using the Ideal Gas Law: PV = nRT. This calculator assumes ideal gas behavior.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Pressure (P), Volume (V), Number of Moles (n), Temperature (T), Gas Constant (R), and Solve for: in the units shown.

Step 2

Read Temperature (T), Number of Moles (n), Volume (V), and Pressure (P) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Standard Conditions (STP)

Pressure (P): 1 atm; Volume (V): 22.4 L; Number of Moles (n): 1 mol; Temperature (T): 273.15 K; Gas Constant (R): 0.0821 L路atm/(mol路K); Solve for:: Pressure (P)

Temperature (T): 273.15 K; Number of Moles (n): 1 mol; Volume (V): 22.4 L; Pressure (P): 1.001143527 atm

Body Temperature (Moles)

Pressure (P): 1 atm; Volume (V): 1 L; Number of Moles (n): 0.042 mol; Temperature (T): 310.15 K; Gas Constant (R): 0.0821 L路atm/(mol路K); Solve for:: Pressure (P)

Temperature (T): 310.15 K; Number of Moles (n): 0.042 mol; Volume (V): 1 L; Pressure (P): 1.06945923 atm

High Pressure

Pressure (P): 100 atm; Volume (V): 1 L; Number of Moles (n): 1 mol; Temperature (T): 300 K; Gas Constant (R): 0.0821 L路atm/(mol路K); Solve for:: Pressure (P)

Temperature (T): 300 K; Number of Moles (n): 1 mol; Volume (V): 1 L; Pressure (P): 24.63 atm

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