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Ideal gas law calculator
PV = nRT: find the pressure, volume, amount or temperature of a gas in any units.
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About Ideal gas law calculator
The ideal gas law PV = nRT links pressure, volume, amount in moles and absolute temperature. Enter three values and solve for the fourth, in common units. Temperature must be in kelvin, and forgetting to convert from Celsius is the most frequent mistake in homework.
How to use Ideal gas law calculator
- Enter your numbers above.
- The result updates instantly as you type.
- Change any value to compare different cases.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
Why must temperature be in kelvin?
Gas volume and pressure scale with absolute temperature. Celsius has an arbitrary zero, so using it breaks the proportionality. Add 273.15 to Celsius to get kelvin.
Is Ideal gas law calculator free?
Yes. Ideal gas law calculator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.