Hectopascals to Inches of Mercury (hPa → inHg)
Formula
1 hPa = 0.02952998016471232 inHgConversion Table
| hPa | inHg |
|---|---|
| 0 | 0 |
| 1.0000 | 0.029530 |
| 2.0000 | 0.059060 |
| 3.0000 | 0.088590 |
| 4.0000 | 0.11812 |
| 5.0000 | 0.14765 |
| 6.0000 | 0.17718 |
| 7.0000 | 0.20671 |
| 8.0000 | 0.23624 |
| 9.0000 | 0.26577 |
| 10.000 | 0.29530 |
| 11.000 | 0.32483 |
| 12.000 | 0.35436 |
| 13.000 | 0.38389 |
| 14.000 | 0.41342 |
| 15.000 | 0.44295 |
| 16.000 | 0.47248 |
| 17.000 | 0.50201 |
| 18.000 | 0.53154 |
| 19.000 | 0.56107 |
| hPa | inHg |
|---|---|
| 20.000 | 0.59060 |
| 21.000 | 0.62013 |
| 22.000 | 0.64966 |
| 23.000 | 0.67919 |
| 24.000 | 0.70872 |
| 25.000 | 0.73825 |
| 26.000 | 0.76778 |
| 27.000 | 0.79731 |
| 28.000 | 0.82684 |
| 29.000 | 0.85637 |
| 30.000 | 0.88590 |
| 31.000 | 0.91543 |
| 32.000 | 0.94496 |
| 33.000 | 0.97449 |
| 34.000 | 1.0040 |
| 35.000 | 1.0335 |
| 36.000 | 1.0631 |
| 37.000 | 1.0926 |
| 38.000 | 1.1221 |
| 39.000 | 1.1517 |
| hPa | inHg |
|---|---|
| 40.000 | 1.1812 |
| 41.000 | 1.2107 |
| 42.000 | 1.2403 |
| 43.000 | 1.2698 |
| 44.000 | 1.2993 |
| 45.000 | 1.3288 |
| 46.000 | 1.3584 |
| 47.000 | 1.3879 |
| 48.000 | 1.4174 |
| 49.000 | 1.4470 |
| 50.000 | 1.4765 |
| 51.000 | 1.5060 |
| 52.000 | 1.5356 |
| 53.000 | 1.5651 |
| 54.000 | 1.5946 |
| 55.000 | 1.6241 |
| 56.000 | 1.6537 |
| 57.000 | 1.6832 |
| 58.000 | 1.7127 |
| 59.000 | 1.7423 |
| hPa | inHg |
|---|---|
| 60.000 | 1.7718 |
| 61.000 | 1.8013 |
| 62.000 | 1.8309 |
| 63.000 | 1.8604 |
| 64.000 | 1.8899 |
| 65.000 | 1.9194 |
| 66.000 | 1.9490 |
| 67.000 | 1.9785 |
| 68.000 | 2.0080 |
| 69.000 | 2.0376 |
| 70.000 | 2.0671 |
| 71.000 | 2.0966 |
| 72.000 | 2.1262 |
| 73.000 | 2.1557 |
| 74.000 | 2.1852 |
| 75.000 | 2.2147 |
| 76.000 | 2.2443 |
| 77.000 | 2.2738 |
| 78.000 | 2.3033 |
| 79.000 | 2.3329 |
Hectopascals to Inches of Mercury Conversion
Converting Hectopascals (hPa) to Inches of Mercury (inHg) is a common pressure conversion. 1 hPa equals 0.02953 inHg. For example, 100 hPa is equal to 2.952998 inHg.
Quick Mental Math: Hectopascals to Inches of Mercury
Pressure units (atm, bar, psi, pascal) are diverse; use atmospheres as a reference tier.
Why is converting Hectopascals to Inches of Mercury tricky?
Magnitude or direction confusion between hectopascals and inches-of-mercury is the primary error source.
Quick Reference Values
1 hPa = 0.02953 inHg. 5 hPa = 0.14765 inHg. 10 hPa = 0.2953 inHg. 25 hPa = 0.73825 inHg. 50 hPa = 1.476499 inHg. 100 hPa = 2.952998 inHg.
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].
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].
Common Misspellings
People often search for this conversion using these alternate spellings: hecto pascals, hecto-pascals, hecto pascal, hec topascal, inch of mercury, inch-mercury, in hg, inches mercury. All of these refer to the Hectopascals to Inches of Mercury conversion.