Inches of mercury (inHg) to Kilopascals (kPa) 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.
Kilopascals
The kilopascal (kPa) is a unit of pressure equal to exactly 1,000 pascals and is one of the most practical pressure units for everyday engineering. Standard atmospheric pressure is approximately 101.3 kPa. Tyre pressure is commonly specified in kPa in metric countries: a typical car tyre is inflated to 220–250 kPa. Blood pressure in clinical settings is measured in mmHg, but some medical devices express it in kPa (normal systolic ≈ 16 kPa).
| Inches of mercury (inHg) | Kilopascals (kPa) |
|---|---|
| 0.1 inHg | 0.3386 kPa |
| 1 inHg | 3.3864 kPa |
| 2 inHg | 6.7728 kPa |
| 3 inHg | 10.1592 kPa |
| 5 inHg | 16.9319 kPa |
| 10 inHg | 33.8639 kPa |
| 20 inHg | 67.7278 kPa |
| 30 inHg | 101.5917 kPa |
| 50 inHg | 169.3194 kPa |
| 100 inHg | 338.6389 kPa |
| 1000 inHg | 3,386.3886 kPa |
Frequently Asked Questions (FAQ)
How many kilopascals are in 1 inches of mercury?
1 inches of mercury (inHg) is exactly 3.3864 kilopascals (kPa).
How do I convert inches of mercury to kilopascals?
Multiply the value in inches of mercury by 3.3864 to get the result in kilopascals. Or use the converter above — type any number and see the result instantly.