Pressure
ftH₂OtoTorr
Convert feet of water column (4 °C) (ftH₂O) to torr (Torr).
Factor1 ftH₂O = 22.41985 Torr
Converter
ftH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Torr
Rendered to 6 significant figures.
Formula
Formula
Torr = ftH₂O × 22.41985
Multiply any value in feet of water column (4 °C) by 22.41985 to obtain the value in torr.
Worked example
Convert 1 ftH₂O to Torr.
- 01Start with 1 ftH₂O.
- 02Multiply by the conversion factor: 1 × 22.41985 = 22.4198 Torr.
Result1 ftH₂O = 22.4198 Torr
Conversion table
| ftH₂O | Torr |
|---|---|
| 1 | 22.42 |
| 2 | 44.84 |
| 5 | 112.1 |
| 10 | 224.2 |
| 20 | 448.4 |
| 50 | 1121 |
| 100 | 2242 |
| 200 | 4484 |
| 500 | 11210 |
| 1000 | 22420 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ftH₂O to Torr?
1 ftH₂O equals 22.41985 Torr. To convert, multiply the value in feet of water column (4 °C) by 22.41985.
How do I convert 1 ftH₂O to Torr?
1 ftH₂O = 22.4198 Torr. For any value, multiply by 22.41985.
How do I convert Torr back to ftH₂O?
Divide by the same factor — or equivalently, multiply by 0.04460334. So 1 Torr = 0.0446033 ftH₂O.
When would I need to convert foot of water column (4 °C) to torr?
Pressure conversions between ftH₂O 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).