Pressure
mH₂OtoTorr
Convert metres of water column (mH₂O) to torr (Torr).
Factor1 mH₂O = 73.55592 Torr
Converter
mH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Torr
Rendered to 6 significant figures.
Formula
Formula
Torr = mH₂O × 73.55592
Multiply any value in metres of water column by 73.55592 to obtain the value in torr.
Worked example
Convert 1 mH₂O to Torr.
- 01Start with 1 mH₂O.
- 02Multiply by the conversion factor: 1 × 73.55592 = 73.5559 Torr.
Result1 mH₂O = 73.5559 Torr
Conversion table
| mH₂O | Torr |
|---|---|
| 1 | 73.556 |
| 2 | 147.11 |
| 5 | 367.78 |
| 10 | 735.56 |
| 20 | 1471.1 |
| 50 | 3677.8 |
| 100 | 7355.6 |
| 200 | 14711 |
| 500 | 36778 |
| 1000 | 73556 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mH₂O to Torr?
1 mH₂O equals 73.55592 Torr. To convert, multiply the value in metres of water column by 73.55592.
How do I convert 1 mH₂O to Torr?
1 mH₂O = 73.5559 Torr. For any value, multiply by 73.55592.
How do I convert Torr back to mH₂O?
Divide by the same factor — or equivalently, multiply by 0.0135951. So 1 Torr = 0.0135951 mH₂O.
When would I need to convert metre of water column to torr?
Pressure conversions between mH₂O 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).