Inches of mercury (inHg) to Pascals (Pa) Conversion
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
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 (inHg) | Pascals (Pa) |
|---|---|
| 0.1 inHg | 338.6389 Pa |
| 1 inHg | 3,386.3886 Pa |
| 2 inHg | 6,772.7773 Pa |
| 3 inHg | 10,159.1659 Pa |
| 5 inHg | 16,931.9432 Pa |
| 10 inHg | 33,863.8864 Pa |
| 20 inHg | 67,727.7728 Pa |
| 30 inHg | 101,591.6592 Pa |
| 50 inHg | 169,319.432 Pa |
| 100 inHg | 338,638.864 Pa |
| 1000 inHg | 3,386,388.6403 Pa |
Frequently Asked Questions (FAQ)
How many pascals are in 1 inches of mercury?
1 inches of mercury (inHg) is exactly 3,386.39 pascals (Pa).
How do I convert inches of mercury to pascals?
Multiply the value in inches of mercury by 3,386.39 to get the result in pascals. Or use the converter above — type any number and see the result instantly.