Pressure
TorrtoftH₂O
Convert torr (Torr) to feet of water column (4 °C) (ftH₂O).
Factor1 Torr = 0.04460334 ftH₂O
Converter
Torr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
ftH₂O
Rendered to 6 significant figures.
Formula
Formula
ftH₂O = Torr × 0.04460334
Multiply any value in torr by 0.04460334 to obtain the value in feet of water column (4 °C).
Worked example
Convert 760 Torr to ftH₂O.
- 01Start with 760 Torr.
- 02Multiply by the conversion factor: 760 × 0.04460334 = 33.8985 ftH₂O.
Result760 Torr = 33.8985 ftH₂O
Conversion table
| Torr | ftH₂O |
|---|---|
| 1 | 0.044603 |
| 2 | 0.089207 |
| 5 | 0.22302 |
| 10 | 0.44603 |
| 20 | 0.89207 |
| 50 | 2.2302 |
| 100 | 4.4603 |
| 200 | 8.9207 |
| 500 | 22.302 |
| 1000 | 44.603 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Torr to ftH₂O?
1 Torr equals 0.04460334 ftH₂O. To convert, multiply the value in torr by 0.04460334.
How do I convert 1 Torr to ftH₂O?
1 Torr = 0.0446033 ftH₂O. For any value, multiply by 0.04460334.
How do I convert ftH₂O back to Torr?
Divide by the same factor — or equivalently, multiply by 22.41985. So 1 ftH₂O = 22.4198 Torr.
When would I need to convert torr to foot of water column (4 °C)?
Pressure conversions between Torr and ftH₂O 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).