For healthcare professionals
A–a Gradient & Alveolar Gas Equation
Alveolar oxygen (PAO₂) by the alveolar gas equation and the alveolar–arterial gradient.
Pressure Unit Converter (mmHg ↔ kPa)
Convert blood pressure or blood gas values between mmHg, kPa and cmH₂O.
Your result will appear here
Enter your measurements, then press Calculate.
Methodology
1 mmHg = 133.322 Pa
kPa = mmHg × 0.133322
One millimetre of mercury equals 133.322 pascals; one cmH₂O equals 98.0665 Pa.
- Who it is for
- Any result reported in these units.
- Version
- 1.0.0
Limitations
- Check which unit your laboratory uses before converting.
References
- Bureau International des Poids et Mesures. The International System of Units (SI). 9th edition. Sèvres: BIPM; 2019 (updated 2024). https://www.bipm.org/en/publications/si-brochure
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