Chemistry

Ideal Gas Law Calculator

Solve pressure, volume, moles, or temperature with PV=nRT.

Last validated: 2026-02-14

Ideal Gas Law Calculator solves for pressure, volume, temperature, or moles using PV = nRT. It is useful in chemistry coursework and gas system estimation. The tool helps avoid rearrangement errors and unit confusion. Use it to check gas-law calculations before reporting.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

Ideal Gas Law Inputs

Use PV = nRT (R = 0.082057 L*atm/mol*K).

Result

Solved value: 1.223265

How to use this tool

Enter three known values among P, V, n, and T with correct units.
Run the solver to compute the unknown term.
Confirm unit consistency (especially temperature in Kelvin) before interpretation.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

Mode: find_pressure
Pressure atm: 1.0
Volume liters: 10.0
Moles: 0.5
Temperature k: 298.15
Gas constant: 0.082057

Expected Outputs

Pressure atm: 1
Volume liters: 10
Moles: 0.5
Temperature k: 298.15

Interpretation

Pressure atm is 1.0. Use this as a decision input, not as a standalone conclusion.
Volume liters is 10.0. Use this as a decision input, not as a standalone conclusion.
Moles is 0.5. Use this as a decision input, not as a standalone conclusion.
Confirm unit consistency and operational constraints before applying this result in production or field conditions.

Scenario Compare (A vs B)

Use this to compare two input sets and quantify change in key outputs.

Scenario A

Mode

Pressure atm

Volume liters

Moles

Temperature k

Gas constant

Scenario B

Mode

Pressure atm

Volume liters

Moles

Temperature k

Gas constant

Confidence and limitations

Outputs are deterministic formula results and depend entirely on input quality and units.
Results are for planning and learning; verify with domain standards before safety-critical use.
Assumes ideal conditions and clean stoichiometry; lab context can change real outcomes.

Formula References

Core chemistry equations such as PV=nRT, M=n/V, C1V1=C2V2, and pH definitions.
Assumes ideal solution/gas behavior unless noted.

Assumptions

Outputs are deterministic formula results and depend entirely on input quality and units.
Results are for planning and learning; verify with domain standards before safety-critical use.
Assumes ideal conditions and clean stoichiometry; lab context can change real outcomes.

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