How to convert inches of mercury to hectopascals
hPa = inHg × 33.86389
Example: 5 inHg × 33.86389 = 169.31945 hPa
Inches of Mercury to Hectopascals table
| Inches of Mercury (inHg) | Hectopascals (hPa) |
|---|---|
| 0.5 inHg | 16.931945 hPa |
| 1 inHg | 33.86389 hPa |
| 2 inHg | 67.72778 hPa |
| 3 inHg | 101.59167 hPa |
| 4 inHg | 135.45556 hPa |
| 5 inHg | 169.31945 hPa |
| 6 inHg | 203.18334 hPa |
| 7 inHg | 237.04723 hPa |
| 8 inHg | 270.91112 hPa |
| 9 inHg | 304.77501 hPa |
| 10 inHg | 338.6389 hPa |
| 15 inHg | 507.95835 hPa |
| 20 inHg | 677.2778 hPa |
| 25 inHg | 846.59725 hPa |
| 30 inHg | 1,015.9167 hPa |
| 40 inHg | 1,354.5556 hPa |
| 50 inHg | 1,693.1945 hPa |
| 75 inHg | 2,539.7918 hPa |
| 100 inHg | 3,386.389 hPa |
| 250 inHg | 8,465.9725 hPa |
| 500 inHg | 16,931.945 hPa |
| 1,000 inHg | 33,863.89 hPa |
About these units
Inches of Mercury (inHg): An inch of mercury is about 3,386.39 Pa, used for barometric pressure in US weather reports and aviation.
Hectopascals (hPa): A hectopascal is 100 Pa, identical to the millibar. Weather maps show air pressure in hPa.
Frequently asked questions
How many hectopascals are in 1 inch of mercury?
1 inch of mercury (inHg) equals 33.86389 hectopascals (hPa).
How do I convert inHg to hPa?
Multiply the value in inches of mercury by 33.86389. For example, 5 inHg × 33.86389 = 169.31945 hPa.
How do I convert hectopascals back to inches of mercury?
Multiply by 0.02952998016 (or divide by 33.86389). 1 hPa = 0.02952998016 inHg.
What is an inch of mercury?
An inch of mercury is about 3,386.39 Pa, used for barometric pressure in US weather reports and aviation.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every pressure unit at once? Use the Pressure Converter.