Pressure
TorrtoinH₂O
Convert torr (Torr) to inches of water column (4 °C) (inH₂O).
Factor1 Torr = 0.5352401 inH₂O
Converter
Torr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
inH₂O
Rendered to 6 significant figures.
Formula
Formula
inH₂O = Torr × 0.5352401
Multiply any value in torr by 0.5352401 to obtain the value in inches of water column (4 °C).
Worked example
Convert 100 Torr to inH₂O.
- 01Start with 100 Torr.
- 02Multiply by the conversion factor: 100 × 0.5352401 = 53.524 inH₂O.
Result100 Torr = 53.524 inH₂O
Conversion table
| Torr | inH₂O |
|---|---|
| 1 | 0.53524 |
| 2 | 1.0705 |
| 5 | 2.6762 |
| 10 | 5.3524 |
| 20 | 10.705 |
| 50 | 26.762 |
| 100 | 53.524 |
| 200 | 107.05 |
| 500 | 267.62 |
| 1000 | 535.24 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Torr to inH₂O?
1 Torr equals 0.5352401 inH₂O. To convert, multiply the value in torr by 0.5352401.
How do I convert 1 Torr to inH₂O?
1 Torr = 0.53524 inH₂O. For any value, multiply by 0.5352401.
How do I convert inH₂O back to Torr?
Divide by the same factor — or equivalently, multiply by 1.86832. So 1 inH₂O = 1.86832 Torr.
When would I need to convert torr to inch of water column (4 °C)?
Pressure conversions between Torr and inH₂O 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).