Ideal Gas Law Calculator
Calculate ideal gas pressure.
Ideal Gas Law measurements
Enter your values, then calculate.
Result
How to calculate ideal gas law
The Ideal Gas Law relates pressure, volume, temperature, and moles of gas — this calculator solves for either pressure or volume depending on which values you provide.
How the calculation works
PV = nRT, solved as Pressure = (n×0.082057×T)÷V or Volume = (n×0.082057×T)÷P, where 0.082057 is the gas constant R in L·atm/(mol·K) and T is in Kelvin.
Example
Solving for pressure with 2 moles, 300K, and 10L volume: (2×0.082057×300)÷10 ≈ 4.92 atm.
Frequently asked questions
Is the Ideal Gas Law Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Is my data saved when I use this calculator?
No. Calculations run entirely in your browser; nothing you enter is sent to or stored on a server.
Ideal Gas Law Calculator
PV = nRT, solved as Pressure = (n×0.082057×T)÷V or Volume = (n×0.082057×T)÷P, where 0.082057 is the gas constant R in L·atm/(mol·K) and T is in Kelvin.
Let's understand your ideal gas law result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Ideal Gas Law
- Temperature must always be in Kelvin for this formula to give correct results.
- This calculator offers two modes (solve for pressure, or solve for volume) — make sure you're providing the three known values needed for whichever you're solving.
Common Ideal Gas Law Mistakes to Avoid
- Entering temperature in Celsius instead of converting to Kelvin first, which produces an incorrect result.
When to Use This Calculator
The Ideal Gas Law relates pressure, volume, temperature, and moles of gas — this calculator solves for either pressure or volume depending on which values you provide.