Formula
This calculator uses the equation below. Use it as a quick reference when checking setup before solving.
PV = nRTGas Laws
Ideal Gas Law Calculator
Calculate one of the variables (P, V, n, T) using the Ideal Gas Law PV = nRT.
PV = nRT
Run this calculator
Leave a nullable field blank to solve for it.
Variable glossary
P (P)
Pressure in atmospheres (atm). Set to null to calculate.
V (V)
Volume in liters (L). Set to null to calculate.
N (n)
Number of moles of the gas. Set to null to calculate.
T (T)
Temperature in Kelvin (K). Set to null to calculate.
R (R)
Gas constant, default is 0.0821 L·atm/(K·mol).
Frequently Asked Questions
What does the Ideal Gas Law calculator solve?
It solves Ideal Gas Law problems in gas laws using your provided inputs and computes unknown values when nullable fields are left blank.
Do I need to convert units before using this tool?
Use the unit toggles where available (for example K/C and L/mL). ChemGenius converts values to the calculator's base units automatically before solving.
Can I save this result in my workflow?
Yes. After computing a result, you can continue into ChemGenius workflows like protocol drafting or notes to keep your calculation context attached to downstream work.