Atmospheres to Millimeters of Mercury (atm → mmHg)
Formula
1 atm = 760.0021001785152 mmHgConversion Table
| atm | mmHg |
|---|---|
| 0 | 0 |
| 1.0000 | 760.00 |
| 2.0000 | 1,520.0 |
| 3.0000 | 2,280.0 |
| 4.0000 | 3,040.0 |
| 5.0000 | 3,800.0 |
| 6.0000 | 4,560.0 |
| 7.0000 | 5,320.0 |
| 8.0000 | 6,080.0 |
| 9.0000 | 6,840.0 |
| 10.000 | 7,600.0 |
| 11.000 | 8,360.0 |
| 12.000 | 9,120.0 |
| 13.000 | 9,880.0 |
| 14.000 | 10,640 |
| 15.000 | 11,400 |
| 16.000 | 12,160 |
| 17.000 | 12,920 |
| 18.000 | 13,680 |
| 19.000 | 14,440 |
| atm | mmHg |
|---|---|
| 20.000 | 15,200 |
| 21.000 | 15,960 |
| 22.000 | 16,720 |
| 23.000 | 17,480 |
| 24.000 | 18,240 |
| 25.000 | 19,000 |
| 26.000 | 19,760 |
| 27.000 | 20,520 |
| 28.000 | 21,280 |
| 29.000 | 22,040 |
| 30.000 | 22,800 |
| 31.000 | 23,560 |
| 32.000 | 24,320 |
| 33.000 | 25,080 |
| 34.000 | 25,840 |
| 35.000 | 26,600 |
| 36.000 | 27,360 |
| 37.000 | 28,120 |
| 38.000 | 28,880 |
| 39.000 | 29,640 |
| atm | mmHg |
|---|---|
| 40.000 | 30,400 |
| 41.000 | 31,160 |
| 42.000 | 31,920 |
| 43.000 | 32,680 |
| 44.000 | 33,440 |
| 45.000 | 34,200 |
| 46.000 | 34,960 |
| 47.000 | 35,720 |
| 48.000 | 36,480 |
| 49.000 | 37,240 |
| 50.000 | 38,000 |
| 51.000 | 38,760 |
| 52.000 | 39,520 |
| 53.000 | 40,280 |
| 54.000 | 41,040 |
| 55.000 | 41,800 |
| 56.000 | 42,560 |
| 57.000 | 43,320 |
| 58.000 | 44,080 |
| 59.000 | 44,840 |
| atm | mmHg |
|---|---|
| 60.000 | 45,600 |
| 61.000 | 46,360 |
| 62.000 | 47,120 |
| 63.000 | 47,880 |
| 64.000 | 48,640 |
| 65.000 | 49,400 |
| 66.000 | 50,160 |
| 67.000 | 50,920 |
| 68.000 | 51,680 |
| 69.000 | 52,440 |
| 70.000 | 53,200 |
| 71.000 | 53,960 |
| 72.000 | 54,720 |
| 73.000 | 55,480 |
| 74.000 | 56,240 |
| 75.000 | 57,000 |
| 76.000 | 57,760 |
| 77.000 | 58,520 |
| 78.000 | 59,280 |
| 79.000 | 60,040 |
Atmospheres to Millimeters of Mercury Conversion
Converting Atmospheres (atm) to Millimeters of Mercury (mmHg) is a common pressure conversion. 1 atm equals 760.0021 mmHg. For example, 100 atm is equal to 76,000.210018 mmHg.
Quick Mental Math: Atmospheres to Millimeters of Mercury
Multiply atmospheres by approximately 760 to convert to millimeters-of-mercury.
Why is converting Atmospheres to Millimeters of Mercury tricky?
The non-integer multiplier 760 is imprecise for mental estimation.
Quick Reference Values
1 atm = 760.0021 mmHg. 5 atm = 3,800.010501 mmHg. 10 atm = 7,600.021002 mmHg. 25 atm = 19,000.052504 mmHg. 50 atm = 38,000.105009 mmHg. 100 atm = 76,000.210018 mmHg.
What is Atmospheres?
Atmospheres (atm) is a unit of pressure. One atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals (Pa). It approximates the average air pressure at sea level on Earth. The atmosphere unit is used for expressing pressures in meteorology and engineering [iso-80000]. The atmosphere was originally defined in the 19th century based on average sea-level air pressure. It was standardized by the International Union of Pure and Applied Chemistry (IUPAC) and other bodies to equal 101,325 Pa in the mid-20th century [nist-sp-811]. Atmospheres are used worldwide in scientific fields, including chemistry and physics, and in engineering applications like pressure vessel design. It is less common in everyday use outside these fields [nist-sp-811].
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: atmosphers, atmosfere, atmospere, atmospherics, millimeter of mercury, mm hg, millimeters mercury, mmhg, millimeters of mercery. All of these refer to the Atmospheres to Millimeters of Mercury conversion.