Can I use atm instead of kPa?
Yes—convert atm to kPa before entering the value (1 atm = 101.325 kPa) so the calculator stays consistent.
Step-by-step walkthrough
Ideal Gas Law Calculator Guide
Use this companion guide beside the interactive calculator to make sure you understand the “why” behind every click. Each section includes the classroom explanation, student-friendly language, and quick practice prompts.
Before you start
Collect the data points listed below and double-check their units. Keeping an organized “givens” list is one of the fastest ways to reduce math errors and impress exam graders.
- ideal gas law
- pv=nrt
- moles
Detailed procedure
Step 1
Pick the unknown variable from the dropdown.
Step 2
Enter the other three values using consistent units (kPa, liters, moles, °C).
Step 3
Review the solved value plus the Kelvin equivalent for temperature.
Teaching & troubleshooting tips
Does this handle non-ideal gases?
No. For high-pressure or low-temperature scenarios you’ll need a real-gas equation such as van der Waals.