Chemistry
Ideal Gas Law Calculator
Choose which term you want to solve for (pressure, volume, moles, or temperature) and enter the remaining three to get a clean PV = nRT solution.
Solve any PV = nRT variable with temperature in °C converted to Kelvin internally.
PV = nRT
R = 8.314 kPa·L/(mol·K)
Temperature is converted from °C to Kelvin internally, so you always stay within the standard formulation of the ideal gas law.
How to use
- Pick the unknown variable from the dropdown.
- Enter the other three values using consistent units (kPa, liters, moles, °C).
- Review the solved value plus the Kelvin equivalent for temperature.
Example
Input: Solve for pressure with n = 1 mol, V = 22.4 L, T = 0°C
Output: Pressure ≈ 101.3 kPa
Student-friendly breakdown
This walkthrough emphasizes the most searched ideas for Ideal Gas Law Calculator: Ideal Gas Law Calculator. Start with the formula above, then follow the guided steps to double-check your work. For quick revision, highlight the givens, plug into the equation, and finish by verifying your units.
Need more support? Use the links below to open the long-form guide, browse additional examples, or hop into adjacent calculators within the same topic — each one is a quick way to double-check your work or handle a related question without starting from scratch.
Deep dive & study plan
Ideal Gas Law Calculator: Solves PV = nRT for any missing variable with Kelvin temperature. It's built around ideal gas law, pv=nrt, moles, so you can go from a raw question to a checked answer without switching tools.
The math behind it: Temperature is converted from °C to Kelvin internally, so you always stay within the standard formulation of the ideal gas law. The core relationship is R = 8.314 kPa·L/(mol·K), shown above the calculator so you can see exactly how your inputs turn into the result.
To use it well: (1) Pick the unknown variable from the dropdown. (2) Enter the other three values using consistent units (kPa, liters, moles, °C). (3) Review the solved value plus the Kelvin equivalent for temperature. Keep your units consistent as you go, and re-run a case you already know the answer to — it's the fastest way to catch a typo before it throws off a result you're relying on.
Worked example: entering Solve for pressure with n = 1 mol, V = 22.4 L, T = 0°C returns Pressure ≈ 101.3 kPa. Try swapping in your own numbers next, especially a case you're unsure about, before you use this for something that matters.
Quick retention checklist
- Speak the formula aloud (or annotate it) so the relationships stick.
- Write each step in your own words and compare with the numbered list above.
- Swap in new numbers for the Example to make sure the calculator (and your logic) handles edge cases.
- Check at least one related calculator below — it's the fastest way to confirm your numbers still line up from a different angle.
FAQ & notes
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.
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.
What formula does the Ideal Gas Law Calculator use?
Temperature is converted from °C to Kelvin internally, so you always stay within the standard formulation of the ideal gas law.
How do I use the Ideal Gas Law Calculator?
Pick the unknown variable from the dropdown. Enter the other three values using consistent units (kPa, liters, moles, °C). Review the solved value plus the Kelvin equivalent for temperature.