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Ideal Gas Law Calculator (PV = nRT)
Solve PV = nRT for pressure, volume, moles or temperature — every input unit converted internally and shown.
Calculator
Results update as you type. Every step of the working is shown below.
Examples:
Result
Enter values above — the answer appears here instantly, with full working.
Formula used
PV = nRT
Every result substitutes your values into this relation step by step above.
Assumptions
- IDEAL GAS assumed — no intermolecular forces, point particles. Deviations grow near condensation or above ~10 bar.
- R = 8.314462618 J/(mol·K), derived from the exact SI constants.
Limitations
- Not valid for very low temperature/high pressure where real-gas corrections matter.