Pressure
inHgtoTorr
Convert inches of mercury (0 °C) (inHg) to torr (Torr).
Factor1 inHg = 25.40001 Torr
Converter
inHg
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Torr
Rendered to 6 significant figures.
Formula
Formula
Torr = inHg × 25.40001
Multiply any value in inches of mercury (0 °C) by 25.40001 to obtain the value in torr.
Worked example
Convert 30 inHg to Torr.
- 01Start with 30 inHg.
- 02Multiply by the conversion factor: 30 × 25.40001 = 762 Torr.
Result30 inHg = 762 Torr
Conversion table
| inHg | Torr |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 5 | 127 |
| 10 | 254 |
| 20 | 508 |
| 50 | 1270 |
| 100 | 2540 |
| 200 | 5080 |
| 500 | 12700 |
| 1000 | 25400 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from inHg to Torr?
1 inHg equals 25.40001 Torr. To convert, multiply the value in inches of mercury (0 °C) by 25.40001.
How do I convert 1 inHg to Torr?
1 inHg = 25.4 Torr. For any value, multiply by 25.40001.
How do I convert Torr back to inHg?
Divide by the same factor — or equivalently, multiply by 0.03937007. So 1 Torr = 0.0393701 inHg.
When would I need to convert inch of mercury (0 °C) to torr?
Pressure conversions between inHg 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).