Millimeters of mercury at standard gravity.
mmHgs to Hectopascals Converter — mmHg to hPa
Convert mmHg (mmHg) to Hectopascal (hPa) using the exact conversion factor (1 mmhg = 1.333223874 hectopascal). See the formula, worked examples, and conversion table.
mmHgs to Hectopascals converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Hectopascal is 100 pascal units.
Result = input x 133.3223874 / 100.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting mmHgs to Hectopascals
mmHg and Hectopascal both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Millimeters of mercury at standard gravity, and hectopascal is 100 pascal units.
Formula
hectopascals = mmhgs × 1.33322387415
This factor comes from each unit's defined relationship to the category's base unit: 1 mmhg equals 133.322387415 base units, and 1 hectopascal equals 100 base units, so dividing one by the other gives the direct mmhg-to-hectopascal factor of 1.33322387415.
Simple example
1 mmHg × 1.333223874 = 1.333223874 hPa
1 mmhg = 1.333223874 hectopascals.
Real-world example
100 mmHg × 1.333223874 = 133.3223874 hPa
100 mmhgs = 133.3223874 hectopascals.
Conversion table
| mmHg (mmHg) | Hectopascal (hPa) |
|---|---|
| 1 mmHg | 1.333223874 hPa |
| 10 mmHg | 13.33223874 hPa |
| 50 mmHg | 66.66119371 hPa |
| 100 mmHg | 133.3223874 hPa |
| 500 mmHg | 666.6119371 hPa |
| 1,000 mmHg | 1,333.223874 hPa |
Reverse conversion: Hectopascal to mmHg
1.333223874 hPa × 0.7500615758 = 0.9999999999 mmHg
1.333223874 hectopascals = 0.9999999999 mmhgs.
mmhgs = hectopascals × 0.750061575846
For a page dedicated to this direction, see Hectopascal to mmHg.
Understanding the mmHg (mmHg)
Millimeters of mercury at standard gravity.
Understanding the Hectopascal (hPa)
Hectopascal is 100 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many hectopascals are in 1 mmhg?
1 mmhg equals 1.333223874 hectopascals, using the exact defined conversion factor rather than an estimate.
How do I convert mmhg to hectopascal?
Multiply the mmhg value by 1.333223874. The converter above does this instantly to whatever precision you set.
How do I convert hectopascal back to mmhg?
Use the reverse factor: 1 hectopascal equals 0.7500615758 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 engineering.
What is a hectopascal?
Hectopascal (hPa) is a unit of engineering.
Is the mmhg to hectopascal conversion exact?
Yes. Both mmhg and hectopascal are defined by fixed standards rather than physical artifacts, so the factor of 1.333223874 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.