Hectopascals to Millimeters of Mercury (hPa → mmHg)
Formula
1 hPa = 0.7500637554192107 mmHgConversion Table
| hPa | mmHg |
|---|---|
| 0 | 0 |
| 1.0000 | 0.75006 |
| 2.0000 | 1.5001 |
| 3.0000 | 2.2502 |
| 4.0000 | 3.0003 |
| 5.0000 | 3.7503 |
| 6.0000 | 4.5004 |
| 7.0000 | 5.2504 |
| 8.0000 | 6.0005 |
| 9.0000 | 6.7506 |
| 10.000 | 7.5006 |
| 11.000 | 8.2507 |
| 12.000 | 9.0008 |
| 13.000 | 9.7508 |
| 14.000 | 10.501 |
| 15.000 | 11.251 |
| 16.000 | 12.001 |
| 17.000 | 12.751 |
| 18.000 | 13.501 |
| 19.000 | 14.251 |
| hPa | mmHg |
|---|---|
| 20.000 | 15.001 |
| 21.000 | 15.751 |
| 22.000 | 16.501 |
| 23.000 | 17.251 |
| 24.000 | 18.002 |
| 25.000 | 18.752 |
| 26.000 | 19.502 |
| 27.000 | 20.252 |
| 28.000 | 21.002 |
| 29.000 | 21.752 |
| 30.000 | 22.502 |
| 31.000 | 23.252 |
| 32.000 | 24.002 |
| 33.000 | 24.752 |
| 34.000 | 25.502 |
| 35.000 | 26.252 |
| 36.000 | 27.002 |
| 37.000 | 27.752 |
| 38.000 | 28.502 |
| 39.000 | 29.252 |
| hPa | mmHg |
|---|---|
| 40.000 | 30.003 |
| 41.000 | 30.753 |
| 42.000 | 31.503 |
| 43.000 | 32.253 |
| 44.000 | 33.003 |
| 45.000 | 33.753 |
| 46.000 | 34.503 |
| 47.000 | 35.253 |
| 48.000 | 36.003 |
| 49.000 | 36.753 |
| 50.000 | 37.503 |
| 51.000 | 38.253 |
| 52.000 | 39.003 |
| 53.000 | 39.753 |
| 54.000 | 40.503 |
| 55.000 | 41.254 |
| 56.000 | 42.004 |
| 57.000 | 42.754 |
| 58.000 | 43.504 |
| 59.000 | 44.254 |
| hPa | mmHg |
|---|---|
| 60.000 | 45.004 |
| 61.000 | 45.754 |
| 62.000 | 46.504 |
| 63.000 | 47.254 |
| 64.000 | 48.004 |
| 65.000 | 48.754 |
| 66.000 | 49.504 |
| 67.000 | 50.254 |
| 68.000 | 51.004 |
| 69.000 | 51.754 |
| 70.000 | 52.504 |
| 71.000 | 53.255 |
| 72.000 | 54.005 |
| 73.000 | 54.755 |
| 74.000 | 55.505 |
| 75.000 | 56.255 |
| 76.000 | 57.005 |
| 77.000 | 57.755 |
| 78.000 | 58.505 |
| 79.000 | 59.255 |
Hectopascals to Millimeters of Mercury Conversion
Converting Hectopascals (hPa) to Millimeters of Mercury (mmHg) is a common pressure conversion. 1 hPa equals 0.750064 mmHg. For example, 100 hPa is equal to 75.006376 mmHg.
Quick Mental Math: Hectopascals to Millimeters of Mercury
Multiply hectopascals by 1.0e+5 for millimeters of mercury; each metric tier adds three zeros.
Why is converting Hectopascals to Millimeters of Mercury tricky?
Magnitude or direction confusion between hectopascals and millimeters-of-mercury is the primary error source.
Quick Reference Values
1 hPa = 0.750064 mmHg. 5 hPa = 3.750319 mmHg. 10 hPa = 7.500638 mmHg. 25 hPa = 18.751594 mmHg. 50 hPa = 37.503188 mmHg. 100 hPa = 75.006376 mmHg.
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 Millimeters of Mercury?
Millimeters of Mercury (mmHg) is a unit of pressure. Millimeters of mercury (mmHg) measure pressure based on a column of mercury 1 millimeter high. It equals exactly 133.322387415 pascals, the SI derived unit for pressure, as defined by international standards. This unit is widely used in medical and meteorological fields for blood pressure and barometric pressure readings [nist-si-guide]. The mmHg unit originated from the mercury barometer invented by Evangelista Torricelli in 1643. It became standardized as a pressure unit because mercury's density allowed precise atmospheric pressure measurements. The adoption of the exact pascal conversion was formalized by the BIPM in the 20th century [bipm-si-brochure]. Millimeters of mercury remain common in healthcare worldwide, especially for blood pressure monitoring in the US and Europe. Meteorologists also use mmHg in weather reporting, though pascals are preferred in scientific contexts. Regulatory standards by ISO and NIST recognize mmHg for specific applications [nist-sp-811].
Common Misspellings
People often search for this conversion using these alternate spellings: hecto pascals, hecto-pascals, hecto pascal, hec topascal, millimeter of mercury, mm hg, millimeters mercury, mmhg, millimeters of mercery. All of these refer to the Hectopascals to Millimeters of Mercury conversion.