Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Standard atmosphere (unit)
open-in-new
<p>The standard atmosphere (symbol: atm) is a <a href="/facts/Measurement_unit/pvTpWbmC">unit</a> of <a href="/facts/Pressure/eyc37GRG">pressure</a> defined as 101325 <a href="/facts/Pascal_(unit)/Am1To2Qm">Pa</a>. It is sometimes used as a <i>reference pressure</i> or <i>standard pressure</i>. It is approximately equal to <a href="/facts/Earth/HLLmDfj0">Earth</a>'s average <a href="/facts/Atmospheric_pressure/wJLMSaVG">atmospheric pressure</a> at <a href="/facts/Sea_level/mDhuI7Xe">sea level</a>. </p>