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Pressure
InHg to Megapascals
Convert inHg (inHg) to megapascals (MPa). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 inHg = 0.003386 MPa
InHg to Megapascals Conversion Table
Common values, ready to copy:
| inHg | megapascals |
|---|---|
| 1 inHg | 0.003386 MPa |
| 2 inHg | 0.006773 MPa |
| 5 inHg | 0.016932 MPa |
| 10 inHg | 0.033864 MPa |
| 25 inHg | 0.08466 MPa |
| 50 inHg | 0.16932 MPa |
| 100 inHg | 0.338639 MPa |
| 1,000 inHg | 3.3864 MPa |
Formula
megapascals = inHg × 0.00338639
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
About InHg and Megapascals
InHg (inHg): Inches of mercury, the imperial equivalent of mmHg; 1 inHg = 25.4 mmHg by definition. Common uses: US weather reports (atmospheric pressure in inches of mercury, standard sea-level pressure ≈ 29.92 inHg), US aviation altimeter settings, and some US vacuum-system contexts.
Megapascals (MPa): A million pascals, or 10 bar; the unit for high-pressure engineering contexts. Common uses: Concrete and steel strength specifications, hydraulic systems, deep-water pressures, and some industrial process measurements.
How the conversion works
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
The exact relationship is megapascals = inHg × 0.00338639, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between inHg and megapascals comes up wherever pressure measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.