Inches of mercury.
inHgs to Megapascals Converter — inHg to MPa
Convert inHg (inHg) to Megapascal (MPa) using the exact conversion factor (1 inhg = 0.003386389 megapascal). See the formula, worked examples, and conversion table.
inHgs to Megapascals 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.
Megapascal is 1000000 pascal units.
Result = input x 3386.389 / 1e+6.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting inHgs to Megapascals
inHg and Megapascal 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: Inches of mercury, and megapascal is 1000000 pascal units.
Formula
megapascals = inhgs × 0.003386389
This factor comes from each unit's defined relationship to the category's base unit: 1 inhg equals 3386.389 base units, and 1 megapascal equals 1000000 base units, so dividing one by the other gives the direct inhg-to-megapascal factor of 0.003386389.
Simple example
1 inHg × 0.003386389 = 0.003386389 MPa
1 inhg = 0.003386389 megapascals.
Real-world example
100 inHg × 0.003386389 = 0.3386389 MPa
100 inhgs = 0.3386389 megapascals.
Conversion table
| inHg (inHg) | Megapascal (MPa) |
|---|---|
| 1 inHg | 0.003386389 MPa |
| 10 inHg | 0.03386389 MPa |
| 50 inHg | 0.16931945 MPa |
| 100 inHg | 0.3386389 MPa |
| 500 inHg | 1.6931945 MPa |
| 1,000 inHg | 3.386389 MPa |
Reverse conversion: Megapascal to inHg
0.003386389 MPa × 295.2998016 = 1 inHg
0.003386389 megapascals = 1 inhg.
inhgs = megapascals × 295.299801647
For a page dedicated to this direction, see Megapascal to inHg.
Understanding the inHg (inHg)
Inches of mercury.
Understanding the Megapascal (MPa)
Megapascal is 1000000 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many megapascals are in 1 inhg?
1 inhg equals 0.003386389 megapascals, using the exact defined conversion factor rather than an estimate.
How do I convert inhg to megapascal?
Multiply the inhg value by 0.003386389. The converter above does this instantly to whatever precision you set.
How do I convert megapascal back to inhg?
Use the reverse factor: 1 megapascal equals 295.2998016 inhgs. You can also use the swap control in the converter above to flip the direction instantly.
What is a inhg?
inHg (inHg) is a unit of engineering.
What is a megapascal?
Megapascal (MPa) is a unit of engineering.
Is the inhg to megapascal conversion exact?
Yes. Both inhg and megapascal are defined by fixed standards rather than physical artifacts, so the factor of 0.003386389 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.