chemistry
Ideal Gas Law Calculator
Solve pressure, volume, amount, or temperature using PV = nRT.
Calculator
Formula
P V = n R T
- P — Pressure
- Pa · kPa · bar · atm
- V — Volume
- m³ · L · mL
- n — Amount of substance
- mol · mmol
- T — Absolute temperature
- K · °C · °F
Assumptions and limits
- The gas behaves ideally and temperature is converted to kelvin.
Example
One mole near room temperature
Choose “Load example” in the calculator to restore these inputs and see the complete steps.
Sources
- Chemistry 2e — OpenStax
- The International System of Units (SI), 9th edition — BIPM
Frequently asked questions
Are my inputs uploaded?
No. This calculator runs locally in your browser. Inputs are placed in a URL only when you explicitly copy a share link.
Why are units converted first?
Canonical units prevent scale errors when inputs use mixed units. The result is converted back to your selected output unit afterward.
Does the result replace professional judgment?
No. The result applies only to the stated model and assumptions. Qualified people should review high-risk engineering, medical, or laboratory decisions.