Inches of Mercury to Megapascals Converter
1 inch of mercury = 0.00338638896 megapascals
1 inch of mercury equals 0.00338639 megapascals
How to convert inches of mercury to megapascals
Unit conversion preserves the pressure reference. Gauge pressure and absolute pressure are different readings; changing between them also needs the ambient pressure. Mercury and water-column units use the conventions stated in their unit notes.
MPa = inHg × 0.00338638896One inch of mercury is 0.00338638896 megapascals, so a single multiplication converts any value.
0.0338639 MPa ≈ 10 × 0.00338638896Inches of mercury to megapascals conversion table
Common values in inches of mercury, converted to megapascals.
| Inches of mercury (inHg) | Megapascals (MPa) |
|---|---|
| 1 | 0.003386389 |
| 2 | 0.0067727779 |
| 3 | 0.010159167 |
| 4 | 0.013545556 |
| 5 | 0.016931945 |
| 10 | 0.03386389 |
| 20 | 0.067727779 |
| 25 | 0.084659724 |
| 50 | 0.16931945 |
| 100 | 0.3386389 |
| 250 | 0.84659724 |
| 500 | 1.6931945 |
| 1,000 | 3.386389 |
About these units
inch of mercuryinHg
Exactly 25.4 mmHg. The US aviation and weather-report pressure unit.
megapascalMPa
One million pascals. Used for material strength and hydraulic systems.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.