Pascals (Pa) to Inches of mercury (inHg) Conversion
Pascals
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square metre (N/m²), named after French mathematician Blaise Pascal who studied fluid pressure in the 17th century. Standard atmospheric pressure at sea level is 101,325 Pa (101.3 kPa). The pascal is a small unit for everyday use — a gentle breeze exerts approximately 1 Pa of dynamic pressure — so kilopascals (kPa) and megapascals (MPa) are more common in practical engineering contexts.
Inches of mercury
The inch of mercury (inHg) is a unit of pressure equal to the pressure exerted by a column of mercury 1 inch (25.4 mm) high — approximately 3,386.39 Pa or 0.0334 atm. It is used in US aviation for altimeter settings (standard pressure is 29.92 inHg) and in US weather reports for barometric pressure. Pilots set their altimeters in inHg based on local barometric pressure to ensure accurate altitude readings.
| Pascals (Pa) | Inches of mercury (inHg) |
|---|---|
| 0.1 Pa | 0.0000295 inHg |
| 1 Pa | 0.000295 inHg |
| 2 Pa | 0.000591 inHg |
| 3 Pa | 0.000886 inHg |
| 5 Pa | 0.00148 inHg |
| 10 Pa | 0.00295 inHg |
| 20 Pa | 0.00591 inHg |
| 30 Pa | 0.00886 inHg |
| 50 Pa | 0.0148 inHg |
| 100 Pa | 0.0295 inHg |
| 1000 Pa | 0.2953 inHg |
Frequently Asked Questions (FAQ)
How many inches of mercury are in 1 pascals?
1 pascals (Pa) is exactly 0.000295 inches of mercury (inHg).
How do I convert pascals to inches of mercury?
Multiply the value in pascals by 0.000295 to get the result in inches of mercury. Or use the converter above — type any number and see the result instantly.