Atmospheres to Millibars (atm → mbar)
Formula
1 atm = 1013.25 mbarConversion Table
| atm | mbar |
|---|---|
| 0 | 0 |
| 1.0000 | 1,013.3 |
| 2.0000 | 2,026.5 |
| 3.0000 | 3,039.8 |
| 4.0000 | 4,053.0 |
| 5.0000 | 5,066.3 |
| 6.0000 | 6,079.5 |
| 7.0000 | 7,092.8 |
| 8.0000 | 8,106.0 |
| 9.0000 | 9,119.3 |
| 10.000 | 10,133 |
| 11.000 | 11,146 |
| 12.000 | 12,159 |
| 13.000 | 13,172 |
| 14.000 | 14,186 |
| 15.000 | 15,199 |
| 16.000 | 16,212 |
| 17.000 | 17,225 |
| 18.000 | 18,239 |
| 19.000 | 19,252 |
| atm | mbar |
|---|---|
| 20.000 | 20,265 |
| 21.000 | 21,278 |
| 22.000 | 22,292 |
| 23.000 | 23,305 |
| 24.000 | 24,318 |
| 25.000 | 25,331 |
| 26.000 | 26,345 |
| 27.000 | 27,358 |
| 28.000 | 28,371 |
| 29.000 | 29,384 |
| 30.000 | 30,398 |
| 31.000 | 31,411 |
| 32.000 | 32,424 |
| 33.000 | 33,437 |
| 34.000 | 34,451 |
| 35.000 | 35,464 |
| 36.000 | 36,477 |
| 37.000 | 37,490 |
| 38.000 | 38,504 |
| 39.000 | 39,517 |
| atm | mbar |
|---|---|
| 40.000 | 40,530 |
| 41.000 | 41,543 |
| 42.000 | 42,557 |
| 43.000 | 43,570 |
| 44.000 | 44,583 |
| 45.000 | 45,596 |
| 46.000 | 46,610 |
| 47.000 | 47,623 |
| 48.000 | 48,636 |
| 49.000 | 49,649 |
| 50.000 | 50,663 |
| 51.000 | 51,676 |
| 52.000 | 52,689 |
| 53.000 | 53,702 |
| 54.000 | 54,716 |
| 55.000 | 55,729 |
| 56.000 | 56,742 |
| 57.000 | 57,755 |
| 58.000 | 58,769 |
| 59.000 | 59,782 |
| atm | mbar |
|---|---|
| 60.000 | 60,795 |
| 61.000 | 61,808 |
| 62.000 | 62,822 |
| 63.000 | 63,835 |
| 64.000 | 64,848 |
| 65.000 | 65,861 |
| 66.000 | 66,875 |
| 67.000 | 67,888 |
| 68.000 | 68,901 |
| 69.000 | 69,914 |
| 70.000 | 70,928 |
| 71.000 | 71,941 |
| 72.000 | 72,954 |
| 73.000 | 73,967 |
| 74.000 | 74,981 |
| 75.000 | 75,994 |
| 76.000 | 77,007 |
| 77.000 | 78,020 |
| 78.000 | 79,034 |
| 79.000 | 80,047 |
Atmospheres to Millibars Conversion
Converting Atmospheres (atm) to Millibars (mbar) is a common pressure conversion. 1 atm equals 1,013.25 mbar. For example, 100 atm is equal to 101,325 mbar.
Quick Reference Values
1 atm = 1,013.25 mbar. 5 atm = 5,066.25 mbar. 10 atm = 10,132.5 mbar. 25 atm = 25,331.25 mbar. 50 atm = 50,662.5 mbar. 100 atm = 101,325 mbar.
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 Millibars?
Millibars (mbar) is a unit of pressure. The millibar is a unit of pressure equal to 100 pascals or 0.1 kilopascals. It is one-thousandth of a bar, which is defined as exactly 100,000 pascals in the International System of Units (SI). The millibar is commonly used in meteorology to measure atmospheric pressure and is recognized under ISO standards for pressure units [iso-80000]. The bar and its subunit, the millibar, were introduced by the German meteorologist Heinrich von Helmholtz in the early 20th century. The millibar was adopted as a practical unit for meteorological pressure measurements before SI units were formalized [nist-sp-811]. Millibars remain widely used in weather reports and aviation worldwide, especially in countries like the United States, United Kingdom, and Australia. Meteorological agencies, including NOAA and the UK Met Office, use millibars alongside pascals for atmospheric pressure [nist-sp-811].
Common Misspellings
People often search for this conversion using these alternate spellings: atmosphers, atmosfere, atmospere, atmospherics, milibars, milibars, millibar, milibar. All of these refer to the Atmospheres to Millibars conversion.