Chemistry calculator
Ideal Gas Law Calculator
Solve ideal gas pressure from moles, temperature, and volume.
Formula
Ideal gas law
This is an ideal gas estimate and may differ from real gases at high pressure, low temperature, or non-ideal conditions.
PV = nRT; P = nRT / V
1 mol at 298.15 K in 24.5 L is close to 1 atm.
FAQs
What gas constant is used?+
The calculator uses R = 8.314462618 kPa L/(mol K).
What units should I enter?+
Use moles, kelvin, and liters to get pressure in kPa.
How does the Ideal Gas Law Calculator calculate the result?+
It uses the Ideal gas law: PV = nRT; P = nRT / V. 1 mol at 298.15 K in 24.5 L is close to 1 atm.
What information do I need to use the Ideal Gas Law Calculator?+
Solve ideal gas pressure from moles, temperature, and volume.
How accurate is the Ideal Gas Law Calculator?+
Ideal Gas Law Calculator applies the formula and assumptions shown on this page. Results may be rounded for readability, so verify changing rates, thresholds, medical guidance, or legal rules with the cited source or a qualified professional.
What should I check before using the Ideal Gas Law Calculator result?+
Check that the units, dates, rates, and assumptions match your situation. Change one input at a time to understand which values have the largest effect on the result.
Chemistry guide
How to use the Ideal Gas Law Calculator
Solve ideal gas pressure from moles, temperature, and volume. The page also explains the ideal gas law and shows a practical example: 1 mol at 298.15 K in 24.5 L is close to 1 atm.
- 1
Enter your details
Enter moles, temperature, and volume, then complete any other fields shown in the calculator.
- 2
Check the calculation
Review the result alongside the ideal gas law: PV = nRT; P = nRT / V.
- 3
Compare scenarios
Change one or more inputs to see how they affect the ideal Gas Law Calculator result before you use the estimate.
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