Pressure
inHgtokPa
Convert inches of mercury (0 °C) (inHg) to kilopascals (kPa).
Factor1 inHg = 3.386389 kPa
Converter
inHg
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kPa
Rendered to 6 significant figures.
Formula
Formula
kPa = inHg × 3.386389
Multiply any value in inches of mercury (0 °C) by 3.386389 to obtain the value in kilopascals.
Worked example
Convert 30 inHg to kPa.
- 01Start with 30 inHg.
- 02Multiply by the conversion factor: 30 × 3.386389 = 101.592 kPa.
Result30 inHg = 101.592 kPa
Conversion table
| inHg | kPa |
|---|---|
| 1 | 3.3864 |
| 2 | 6.7728 |
| 5 | 16.932 |
| 10 | 33.864 |
| 20 | 67.728 |
| 50 | 169.32 |
| 100 | 338.64 |
| 200 | 677.28 |
| 500 | 1693.2 |
| 1000 | 3386.4 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from inHg to kPa?
1 inHg equals 3.386389 kPa. To convert, multiply the value in inches of mercury (0 °C) by 3.386389.
How do I convert 1 inHg to kPa?
1 inHg = 3.38639 kPa. For any value, multiply by 3.386389.
How do I convert kPa back to inHg?
Divide by the same factor — or equivalently, multiply by 0.2952998. So 1 kPa = 0.2953 inHg.
When would I need to convert inch of mercury (0 °C) to kilopascal?
Pressure conversions between inHg and kPa 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).