Millimeters of mercury at standard gravity.
mmHgs to Pascals Converter — mmHg to Pa
Convert mmHg (mmHg) to Pascal (Pa) using the exact conversion factor (1 mmhg = 133.3223874 pascal). See the formula, worked examples, conversion table, history, and common uses.
mmHgs to Pascals converter
Converter
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
Context values
Some unit families need one extra value for a physically accurate result.
The pascal is one newton per square meter.
Result = input x 133.3223874 / 1.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting mmHgs to Pascals
mmHg and Pascal both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Specifically: Millimeters of mercury at standard gravity, and the pascal is one newton per square meter.
Formula
pascals = mmhgs × 133.322387415
This factor comes from each unit's defined relationship to the category's base unit: 1 mmhg equals 133.322387415 base units, and 1 pascal equals 1 base unit, so dividing one by the other gives the direct mmhg-to-pascal factor of 133.322387415.
Simple example
1 mmHg × 133.3223874 = 133.3223874 Pa
1 mmhg = 133.3223874 pascals.
Real-world example
35 mmHg × 133.3223874 = 4,666.28356 Pa
35 mmhgs = 4,666.28356 pascals.
Conversion table
| mmHg (mmHg) | Pascal (Pa) |
|---|---|
| 1 mmHg | 133.3223874 Pa |
| 5 mmHg | 666.6119371 Pa |
| 10 mmHg | 1,333.223874 Pa |
| 25 mmHg | 3,333.059685 Pa |
| 50 mmHg | 6,666.119371 Pa |
| 100 mmHg | 13,332.23874 Pa |
Reverse conversion: Pascal to mmHg
133.3223874 Pa × 0.007500615758 = 0.9999999999 mmHg
133.3223874 pascals = 0.9999999999 mmhgs.
mmhgs = pascals × 0.00750061575846
For a page dedicated to this direction, see Pascal to mmHg.
Understanding the mmHg (mmHg)
Millimeters of mercury at standard gravity.
Understanding the Pascal
Pascal (Pa) measures pressure. The pascal is the SI derived unit of pressure: one newton of force per square meter. It is classified as a SI derived unit.
Where it's used: Standard scientific pressure unit worldwide
Uses of the Pascal today
- Scientific and engineering pressure measurement worldwide
- Meteorology (often as hectopascals, equivalent to millibars)
- Material science (stress and strength, typically in megapascals)
History of the Pascal
The pascal is named after Blaise Pascal, whose 17th-century experiments clarified the physics of fluid pressure and vacuum. It was adopted as the SI derived unit of pressure in 1971, replacing the older, non-coherent CGS pressure units used in much scientific work up to that point.
Historical origin. Pascal was not the invention of a single named person; it developed through the process described above.
Pascal — sources
- BIPM SI Brochure — Coherent derived units — Defines the pascal as the SI unit of pressure.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pascals are in 1 mmhg?
1 mmhg equals 133.3223874 pascals, using the exact defined conversion factor rather than an estimate.
How do I convert mmhg to pascal?
Multiply the mmhg value by 133.3223874. The converter above does this instantly to whatever precision you set.
How do I convert pascal back to mmhg?
Use the reverse factor: 1 pascal equals 0.0075006158 mmhgs. You can also use the swap control in the converter above to flip the direction instantly.
What is a mmhg?
mmHg (mmHg) is a unit of pressure.
What is a pascal?
Pascal (Pa) measures pressure. The pascal is the SI derived unit of pressure: one newton of force per square meter. It is classified as a SI derived unit.
Is the mmhg to pascal conversion exact?
Yes. Both mmhg and pascal are defined by fixed standards rather than physical artifacts, so the factor of 133.3223874 used above is exact to as many digits as you choose to display.