Ideal Gas Law Calculator
Find absolute gas pressure from amount, temperature and volume.
Formula
p = nRT/V; R ≈ 8.314462618 J/(mol·K).
Amount (mol): 1 mol · Temperature: 300 K · Gas volume: 10 L · Absolute pressure (kPa) ≈ (1 mol)×8.314462618×(300 K × 1 K/K + 0 K)÷(10 L)
How to use
- Enter the amount in moles.
- Enter temperature and gas volume.
- Read absolute pressure in kPa.
Examples
- 1 mol at 300 K in 10 L gives 249.434 kPa.
Frequently asked questions
Is this gauge pressure?
No. Subtract ambient pressure to obtain gauge pressure.
Does it model real gases?
It assumes a dilute ideal gas, away from condensation.
Can I enter Celsius?
Yes. The calculator converts it to kelvin; temperature and volume must be positive.
Sources
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