Ideal Gas Law Calculator
Solve PV = nRT for any variable.
P
1.0006
atmIntroduction
Calculate pressure, volume, moles, or temperature using the ideal gas law with your choice of R constant. A foundation for gas stoichiometry problems. Use The Daily Tools' Ideal Gas Law Calculator for private, browser-based processing — no account or server upload required.
What is Ideal Gas Law Calculator?
Ideal Gas Law Calculator helps you solve pv = nrt for any variable. Use it to check chemistry arithmetic after you have identified the substances, balanced equation, units, and assumptions that apply to your problem.
Definition: Ideal Gas Law Calculator is a free, browser-based calculator for solve PV = nRT for any variable.
Formula
PV = nRT
Calculation steps
- The core formula: PV = nRT
- Enter your values in the fields above — units and assumptions are under your control.
- The Daily Tools computes the result instantly in your browser using JavaScript.
- Review the result panel for the primary output and supporting breakdown values.
Worked example
Example: pressure of 0.500 mol gas in a 10.0 L vessel at 298 K
Inputs: n = 0.500 mol, V = 10.0 L, T = 298 K, R = 0.082057 L·atm/(mol·K)
- Rearrange PV = nRT to P = nRT ÷ V.
- Use kelvin, not degrees Celsius.
- Substitute matching units for the chosen R constant.
The ideal-gas pressure is about 1.22 atm.
Use cases
- Checking a gas laws calculation for coursework or lab preparation
- Showing the formula, units, and intermediate quantities behind a result
- Comparing a calculation with a balanced equation, data table, or measured value
Advantages
- Browser-based processing — entered values and selected files are not sent to our servers
- No account required
- Instant results with a clean, readable interface
- Transparent formula shown on this page
Limitations
- Results depend on the formula, units, significant figures, and chemical data entered.
- A calculator cannot determine whether a reaction equation, chemical formula, or experimental measurement is correct.
- Use appropriate laboratory procedures, safety information, and instructor or supervisor guidance for real experiments.
Frequently asked questions
- Why must temperature be in kelvin?
- PV = nRT uses absolute temperature. Convert Celsius to kelvin by adding 273.15 before calculating.
- When is the ideal gas law less reliable?
- Real gases can deviate noticeably at high pressure or low temperature, where molecular size and attractions matter more.
- How do I choose R?
- Choose an R value whose pressure and volume units match your inputs, such as 0.082057 L·atm/(mol·K) for liters and atmospheres.
- Is the Ideal Gas Law Calculator free to use?
- Yes. Ideal Gas Law Calculator on The Daily Tools is completely free, requires no account, and runs entirely in your browser.
- Does The Daily Tools store my inputs?
- No. Your numbers and text never leave your device. The Daily Tools has no backend database for calculator inputs.
- Who should use the Ideal Gas Law Calculator?
- Anyone who needs a clear chemistry calculation and wants to check the assumptions used.
- How accurate is the Ideal Gas Law Calculator?
- Results follow the standard formula shown on this page. They are estimates for planning — not a substitute for professional advice.
- Can I use the Ideal Gas Law Calculator on mobile?
- Yes. The Daily Tools is fully responsive and works on phones, tablets, and desktops.
Sources & references
Key points
- Ideal Gas Law Calculator is a free, browser-based calculator for solve PV = nRT for any variable.
- Formula: PV = nRT
- Private, browser-only processing
- Private, browser-based processing