Bars to Atmospheres (bar → atm)
Formula
1 bar = 0.9869232667160128 atmConversion Table
| bar | atm |
|---|---|
| 0 | 0 |
| 1.0000 | 0.98692 |
| 2.0000 | 1.9738 |
| 3.0000 | 2.9608 |
| 4.0000 | 3.9477 |
| 5.0000 | 4.9346 |
| 6.0000 | 5.9215 |
| 7.0000 | 6.9085 |
| 8.0000 | 7.8954 |
| 9.0000 | 8.8823 |
| 10.000 | 9.8692 |
| 11.000 | 10.856 |
| 12.000 | 11.843 |
| 13.000 | 12.830 |
| 14.000 | 13.817 |
| 15.000 | 14.804 |
| 16.000 | 15.791 |
| 17.000 | 16.778 |
| 18.000 | 17.765 |
| 19.000 | 18.752 |
| bar | atm |
|---|---|
| 20.000 | 19.738 |
| 21.000 | 20.725 |
| 22.000 | 21.712 |
| 23.000 | 22.699 |
| 24.000 | 23.686 |
| 25.000 | 24.673 |
| 26.000 | 25.660 |
| 27.000 | 26.647 |
| 28.000 | 27.634 |
| 29.000 | 28.621 |
| 30.000 | 29.608 |
| 31.000 | 30.595 |
| 32.000 | 31.582 |
| 33.000 | 32.568 |
| 34.000 | 33.555 |
| 35.000 | 34.542 |
| 36.000 | 35.529 |
| 37.000 | 36.516 |
| 38.000 | 37.503 |
| 39.000 | 38.490 |
| bar | atm |
|---|---|
| 40.000 | 39.477 |
| 41.000 | 40.464 |
| 42.000 | 41.451 |
| 43.000 | 42.438 |
| 44.000 | 43.425 |
| 45.000 | 44.412 |
| 46.000 | 45.398 |
| 47.000 | 46.385 |
| 48.000 | 47.372 |
| 49.000 | 48.359 |
| 50.000 | 49.346 |
| 51.000 | 50.333 |
| 52.000 | 51.320 |
| 53.000 | 52.307 |
| 54.000 | 53.294 |
| 55.000 | 54.281 |
| 56.000 | 55.268 |
| 57.000 | 56.255 |
| 58.000 | 57.242 |
| 59.000 | 58.228 |
| bar | atm |
|---|---|
| 60.000 | 59.215 |
| 61.000 | 60.202 |
| 62.000 | 61.189 |
| 63.000 | 62.176 |
| 64.000 | 63.163 |
| 65.000 | 64.150 |
| 66.000 | 65.137 |
| 67.000 | 66.124 |
| 68.000 | 67.111 |
| 69.000 | 68.098 |
| 70.000 | 69.085 |
| 71.000 | 70.072 |
| 72.000 | 71.058 |
| 73.000 | 72.045 |
| 74.000 | 73.032 |
| 75.000 | 74.019 |
| 76.000 | 75.006 |
| 77.000 | 75.993 |
| 78.000 | 76.980 |
| 79.000 | 77.967 |
Bars to Atmospheres Conversion
Converting Bars (bar) to Atmospheres (atm) is a common pressure conversion. 1 bar equals 0.986923 atm. For example, 100 bar is equal to 98.692327 atm.
Quick Mental Math: Bars to Atmospheres
One bar ≈ 0.987 atmospheres (≈0.99 atm); very close but not identical.
Why is converting Bars to Atmospheres tricky?
Bar and atm are nearly equal; the 1.3% difference is easy to ignore, causing subtle errors.
Quick Reference Values
1 bar = 0.986923 atm. 5 bar = 4.934616 atm. 10 bar = 9.869233 atm. 25 bar = 24.673082 atm. 50 bar = 49.346163 atm. 100 bar = 98.692327 atm.
What is Bars?
Bars (bar) is a unit of pressure. The bar is a unit of pressure equal to exactly 100,000 pascals (Pa). It is used to measure pressure or stress and is slightly less than the standard atmospheric pressure of 101,325 Pa. The bar is not an SI unit but is accepted for use with SI by the BIPM due to its convenience in many engineering fields [bipm-si-brochure]. The bar was introduced by the Norwegian meteorologist Vilhelm Bjerknes in 1909 to simplify atmospheric pressure measurements. It gained wider recognition in the mid-20th century and was formally accepted for use with the SI by the BIPM to provide a practical unit for pressure [bipm-si-brochure]. The bar is widely used in meteorology, engineering, and automotive industries worldwide, especially in Europe and Asia. It remains common in barometric pressure readings and tire pressure specifications, although the pascal is the SI base unit [bipm-si-brochure].
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].
Common Misspellings
People often search for this conversion using these alternate spellings: barres, barre, bars pressure, atmosphers, atmosfere, atmospere, atmospherics. All of these refer to the Bars to Atmospheres conversion.