Physics

Ideal Gas Law Calculator

Find gas pressure from amount, temperature and volume (PV = nRT).

Amount (mol)

Temperature (K)

Volume

Calculated Output

Pressure (Pa) 99,773.55

Formula: P = n·R·T ÷ V

Step-by-Step Breakdown

1. Values used:

2. Amount = 1 mol

3. Temperature = 300 K

4. Volume = 0.025

6. Pressure = 99,773.55Pa

Did this calculator solve your problem today?

The math behind it

PV = nRT with R = 8.314 J/(mol·K). Solve for P = nRT ÷ V.

1 mol at 300 K in 0.025 m³ → about 99,773 Pa.

When does the ideal model fail?

At high pressure or low temperature; then use the van der Waals equation.