Inches of Mercury to Megapascals (inHg → MPa)
Formula
1 inHg = 0.003386389 MPaConversion Table
| inHg | MPa |
|---|---|
| 0 | 0 |
| 1.0000 | 0.0033864 |
| 2.0000 | 0.0067728 |
| 3.0000 | 0.010159 |
| 4.0000 | 0.013546 |
| 5.0000 | 0.016932 |
| 6.0000 | 0.020318 |
| 7.0000 | 0.023705 |
| 8.0000 | 0.027091 |
| 9.0000 | 0.030478 |
| 10.000 | 0.033864 |
| 11.000 | 0.037250 |
| 12.000 | 0.040637 |
| 13.000 | 0.044023 |
| 14.000 | 0.047409 |
| 15.000 | 0.050796 |
| 16.000 | 0.054182 |
| 17.000 | 0.057569 |
| 18.000 | 0.060955 |
| 19.000 | 0.064341 |
| inHg | MPa |
|---|---|
| 20.000 | 0.067728 |
| 21.000 | 0.071114 |
| 22.000 | 0.074501 |
| 23.000 | 0.077887 |
| 24.000 | 0.081273 |
| 25.000 | 0.084660 |
| 26.000 | 0.088046 |
| 27.000 | 0.091433 |
| 28.000 | 0.094819 |
| 29.000 | 0.098205 |
| 30.000 | 0.10159 |
| 31.000 | 0.10498 |
| 32.000 | 0.10836 |
| 33.000 | 0.11175 |
| 34.000 | 0.11514 |
| 35.000 | 0.11852 |
| 36.000 | 0.12191 |
| 37.000 | 0.12530 |
| 38.000 | 0.12868 |
| 39.000 | 0.13207 |
| inHg | MPa |
|---|---|
| 40.000 | 0.13546 |
| 41.000 | 0.13884 |
| 42.000 | 0.14223 |
| 43.000 | 0.14561 |
| 44.000 | 0.14900 |
| 45.000 | 0.15239 |
| 46.000 | 0.15577 |
| 47.000 | 0.15916 |
| 48.000 | 0.16255 |
| 49.000 | 0.16593 |
| 50.000 | 0.16932 |
| 51.000 | 0.17271 |
| 52.000 | 0.17609 |
| 53.000 | 0.17948 |
| 54.000 | 0.18287 |
| 55.000 | 0.18625 |
| 56.000 | 0.18964 |
| 57.000 | 0.19302 |
| 58.000 | 0.19641 |
| 59.000 | 0.19980 |
| inHg | MPa |
|---|---|
| 60.000 | 0.20318 |
| 61.000 | 0.20657 |
| 62.000 | 0.20996 |
| 63.000 | 0.21334 |
| 64.000 | 0.21673 |
| 65.000 | 0.22012 |
| 66.000 | 0.22350 |
| 67.000 | 0.22689 |
| 68.000 | 0.23027 |
| 69.000 | 0.23366 |
| 70.000 | 0.23705 |
| 71.000 | 0.24043 |
| 72.000 | 0.24382 |
| 73.000 | 0.24721 |
| 74.000 | 0.25059 |
| 75.000 | 0.25398 |
| 76.000 | 0.25737 |
| 77.000 | 0.26075 |
| 78.000 | 0.26414 |
| 79.000 | 0.26752 |
Inches of Mercury to Megapascals Conversion
Converting Inches of Mercury (inHg) to Megapascals (MPa) is a common pressure conversion. 1 inHg equals 0.003386 MPa. For example, 100 inHg is equal to 0.338639 MPa.
Quick Reference Values
1 inHg = 0.003386 MPa. 5 inHg = 0.016932 MPa. 10 inHg = 0.033864 MPa. 25 inHg = 0.08466 MPa. 50 inHg = 0.169319 MPa. 100 inHg = 0.338639 MPa.
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 Megapascals?
Megapascals (MPa) is a unit of pressure. The megapascal (MPa) equals one million pascals (Pa), the SI derived unit for pressure. It measures force per unit area, with 1 MPa equaling 1,000,000 N/m². The pascal is defined by the BIPM as one newton per square meter, making the megapascal a standard for high-pressure measurements in engineering and materials science[bipm-si-brochure]. The pascal unit was adopted by the CGPM in 1971, named after Blaise Pascal to honor his work in hydrostatics. The megapascal as a multiple of the pascal emerged with the widespread use of the SI system to quantify large pressure values in the 20th century[bipm-si-brochure]. Megapascals are widely used globally in engineering, construction, and materials testing. Countries adopting the metric system, including those in Europe and Asia, rely on MPa for tensile strength and pressure measurements. The ISO 80000 standard references MPa for expressing pressure in technical documentation[iso-80000].
Common Misspellings
People often search for this conversion using these alternate spellings: inch of mercury, inch-mercury, in hg, inches mercury, mega pascal, megapascel, megapascal, megapascall, megapascal. All of these refer to the Inches of Mercury to Megapascals conversion.