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Ideal gas pressure calculator

Calculate absolute gas pressure from amount of substance, volume and temperature using the ideal gas law.

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01

Your inputs

The starting values are an example.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

pV = nRT; T in kelvin = temperature in °C + 273.15

Worked example

1 mol at 25 °C and a volume of approximately 24.79 l gives an absolute pressure of about 100 kPa.

Things to check

  • The equation requires absolute temperature.
  • The result is absolute pressure. Subtract the appropriate ambient pressure to find gauge pressure.

Sources and references