Inches of Mercury to Hectopascals (inHg → hPa)
Formula
1 inHg = 33.86389 hPaConversion Table
| inHg | hPa |
|---|---|
| 0 | 0 |
| 1.0000 | 33.864 |
| 2.0000 | 67.728 |
| 3.0000 | 101.59 |
| 4.0000 | 135.46 |
| 5.0000 | 169.32 |
| 6.0000 | 203.18 |
| 7.0000 | 237.05 |
| 8.0000 | 270.91 |
| 9.0000 | 304.78 |
| 10.000 | 338.64 |
| 11.000 | 372.50 |
| 12.000 | 406.37 |
| 13.000 | 440.23 |
| 14.000 | 474.09 |
| 15.000 | 507.96 |
| 16.000 | 541.82 |
| 17.000 | 575.69 |
| 18.000 | 609.55 |
| 19.000 | 643.41 |
| inHg | hPa |
|---|---|
| 20.000 | 677.28 |
| 21.000 | 711.14 |
| 22.000 | 745.01 |
| 23.000 | 778.87 |
| 24.000 | 812.73 |
| 25.000 | 846.60 |
| 26.000 | 880.46 |
| 27.000 | 914.33 |
| 28.000 | 948.19 |
| 29.000 | 982.05 |
| 30.000 | 1,015.9 |
| 31.000 | 1,049.8 |
| 32.000 | 1,083.6 |
| 33.000 | 1,117.5 |
| 34.000 | 1,151.4 |
| 35.000 | 1,185.2 |
| 36.000 | 1,219.1 |
| 37.000 | 1,253.0 |
| 38.000 | 1,286.8 |
| 39.000 | 1,320.7 |
| inHg | hPa |
|---|---|
| 40.000 | 1,354.6 |
| 41.000 | 1,388.4 |
| 42.000 | 1,422.3 |
| 43.000 | 1,456.1 |
| 44.000 | 1,490.0 |
| 45.000 | 1,523.9 |
| 46.000 | 1,557.7 |
| 47.000 | 1,591.6 |
| 48.000 | 1,625.5 |
| 49.000 | 1,659.3 |
| 50.000 | 1,693.2 |
| 51.000 | 1,727.1 |
| 52.000 | 1,760.9 |
| 53.000 | 1,794.8 |
| 54.000 | 1,828.7 |
| 55.000 | 1,862.5 |
| 56.000 | 1,896.4 |
| 57.000 | 1,930.2 |
| 58.000 | 1,964.1 |
| 59.000 | 1,998.0 |
| inHg | hPa |
|---|---|
| 60.000 | 2,031.8 |
| 61.000 | 2,065.7 |
| 62.000 | 2,099.6 |
| 63.000 | 2,133.4 |
| 64.000 | 2,167.3 |
| 65.000 | 2,201.2 |
| 66.000 | 2,235.0 |
| 67.000 | 2,268.9 |
| 68.000 | 2,302.7 |
| 69.000 | 2,336.6 |
| 70.000 | 2,370.5 |
| 71.000 | 2,404.3 |
| 72.000 | 2,438.2 |
| 73.000 | 2,472.1 |
| 74.000 | 2,505.9 |
| 75.000 | 2,539.8 |
| 76.000 | 2,573.7 |
| 77.000 | 2,607.5 |
| 78.000 | 2,641.4 |
| 79.000 | 2,675.2 |
Inches of Mercury to Hectopascals Conversion
Converting Inches of Mercury (inHg) to Hectopascals (hPa) is a common pressure conversion. 1 inHg equals 33.86389 hPa. For example, 100 inHg is equal to 3,386.389 hPa.
Quick Reference Values
1 inHg = 33.86389 hPa. 5 inHg = 169.31945 hPa. 10 inHg = 338.6389 hPa. 25 inHg = 846.59725 hPa. 50 inHg = 1,693.1945 hPa. 100 inHg = 3,386.389 hPa.
What is Inches of Mercury?
Inches of Mercury (inHg) is a unit of pressure. Inches of mercury measure pressure as the height of a mercury column in inches exerted by atmospheric or other pressures. One inch of mercury equals exactly 3,386.389 pascals (Pa). This unit is commonly used in barometry and aviation altimetry [nist-si-guide]. The unit originates from mercury barometers developed by Evangelista Torricelli in 1643. Measuring pressure via mercury column height became standard in meteorology and aviation. The inch unit was adapted for use in English-speaking countries [nist-si-guide]. Inches of mercury are used mainly in the United States and Canada for weather reports and aircraft altimeters. Internationally, the pascal is preferred, but inHg remains common in aviation and HVAC industries [nist-si-guide].
What is Hectopascals?
Hectopascals (hPa) is a unit of pressure. The hectopascal is a unit of pressure equal to 100 pascals. It is defined as exactly 100 newtons per square meter (100 N/m²), where the pascal (Pa) is the SI derived unit of pressure. The hectopascal is widely used in meteorology for atmospheric pressure measurements and aligns with the SI system as per international standards [bipm-si-brochure]. The pascal unit was named after Blaise Pascal and officially adopted by the General Conference on Weights and Measures (CGPM) in 1971. The hectopascal emerged as a convenient multiple used in meteorology to represent atmospheric pressure values in the 20th century [cgpm-resolutions]. Hectopascals are standard in weather reports worldwide, especially in Europe, Asia, and Australia. The US National Weather Service uses millibars, numerically equivalent to hectopascals, for atmospheric pressure. It is recognized by ISO 80000 as a unit of pressure [iso-80000].
Common Misspellings
People often search for this conversion using these alternate spellings: inch of mercury, inch-mercury, in hg, inches mercury, hecto pascals, hecto-pascals, hecto pascal, hec topascal. All of these refer to the Inches of Mercury to Hectopascals conversion.