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Pressure

cmH₂OtoTorr

Convert centimetres of water column (cmH₂O) to torr (Torr).

Factor1 cmH₂O = 0.7355592 Torr

Converter

cmH₂O

Accepts numbers or expressions, e.g. 150 + 14.7

Result
73.5559Torr

Rendered to 6 significant figures.

Formula

Formula
Torr = cmH₂O × 0.7355592

Multiply any value in centimetres of water column by 0.7355592 to obtain the value in torr.

Worked example

Convert 100 cmH₂O to Torr.

  1. 01Start with 100 cmH₂O.
  2. 02Multiply by the conversion factor: 100 × 0.7355592 = 73.5559 Torr.
Result100 cmH₂O = 73.5559 Torr

Conversion table

cmH₂OTorr
10.73556
21.4711
53.6778
107.3556
2014.711
5036.778
10073.556
200147.11
500367.78
1000735.56

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from cmH₂O to Torr?
1 cmH₂O equals 0.7355592 Torr. To convert, multiply the value in centimetres of water column by 0.7355592.
How do I convert 1 cmH₂O to Torr?
1 cmH₂O = 0.735559 Torr. For any value, multiply by 0.7355592.
How do I convert Torr back to cmH₂O?
Divide by the same factor — or equivalently, multiply by 1.35951. So 1 Torr = 1.35951 cmH₂O.
When would I need to convert centimetre of water column to torr?
Pressure conversions between cmH₂O and Torr are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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