Pressure
hPatommHg
Convert hectopascals (hPa) to millimetres of mercury (mmHg).
Factor1 hPa = 0.7500616 mmHg
Converter
hPa
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mmHg
Rendered to 6 significant figures.
Formula
Formula
mmHg = hPa × 0.7500616
Multiply any value in hectopascals by 0.7500616 to obtain the value in millimetres of mercury.
Worked example
Convert 1013.25 hPa to mmHg.
- 01Start with 1013.25 hPa.
- 02Multiply by the conversion factor: 1013.25 × 0.7500616 = 760 mmHg.
Result1013.25 hPa = 760 mmHg
Conversion table
| hPa | mmHg |
|---|---|
| 1 | 0.75006 |
| 2 | 1.5001 |
| 5 | 3.7503 |
| 10 | 7.5006 |
| 20 | 15.001 |
| 50 | 37.503 |
| 100 | 75.006 |
| 200 | 150.01 |
| 500 | 375.03 |
| 1000 | 750.06 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from hPa to mmHg?
1 hPa equals 0.7500616 mmHg. To convert, multiply the value in hectopascals by 0.7500616.
How do I convert 1 hPa to mmHg?
1 hPa = 0.750062 mmHg. For any value, multiply by 0.7500616.
How do I convert mmHg back to hPa?
Divide by the same factor — or equivalently, multiply by 1.333224. So 1 mmHg = 1.33322 hPa.
When would I need to convert hectopascal to millimetre of mercury?
Pressure conversions between hPa and mmHg 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).