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Centimeters of Water to Pascals Converter.

Convert centimeters of water column to pascals.

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Pascals: 98.0665

Pascals

0.000000000000

Uses water at 4 °C: 1 cmH₂O = 98.0665 Pa.

FAQs

How does the centimeters of water to pascals converter work?

Uses water at 4 °C: 1 cmH₂O = 98.0665 Pa.

Use Cases

HVAC and Pneumatics

Convert pressure readings from manometers or pressure gauges that use centimeters of water column into pascals, the SI unit, for easier comparison with other equipment.

Example: A ventilation system pressure drop of 15 cmH2O equals 1470.9975 Pa.

Medical and Laboratory

Translate cmH2O measurements (e.g., in respiratory or fluid dynamics) to pascals for scientific calculations or reporting.

Example: A water column height of 20 cmH2O is equivalent to 1961.33 Pa.

Frequently Asked Questions

How do I convert centimeters of water to pascals?
To convert cmH2O to Pa, multiply the value in cmH2O by 98.0665. For example, 10 cmH2O equals 980.665 Pa. This converter does that calculation for you instantly.
What is the conversion factor between cmH2O and Pa?
1 centimeter of water column (cmH2O) is exactly equal to 98.0665 pascals (Pa). This is based on the standard acceleration due to gravity and the density of water.
Is this converter accurate for all cmH2O values?
Yes, the converter uses the standard conversion factor of 98.0665 Pa per cmH2O, which is accurate for most practical purposes. However, for extremely precise measurements, consider temperature and altitude effects.

Tips & Common Mistakes

Tips

  • Remember that 1 cmH2O is approximately 98 Pa, so for quick mental estimates, multiply by 100 and subtract 2%.
  • Double-check your input value: ensure you are entering centimeters of water, not millimeters or inches of water.
  • Use the converter for quick conversions, but for critical applications, verify with a reference table or calibration.
  • If you need to convert back from pascals to cmH2O, divide by 98.0665.

Common Mistakes to Avoid

  • Confusing cmH2O with mmH2O: 1 cmH2O equals 10 mmH2O, so ensure you use the correct unit.
  • Using an incorrect conversion factor: some sources may round to 100 Pa per cmH2O, which introduces error.
  • Forgetting that this converter only handles cmH2O to Pa, not other pressure units like psi or bar.

Last updated: August 13, 2026