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standard atmosphere
Symbol:  atm 
Category:  Pressure 
SI Equivalent:  1.01325×105 Pa
Dimension ML-1T-2 
System:  INT 
 
Notes
Unit of pressure equal that represents the air pressure at mean sea level. This unit is now defined as 101325 Pa.
Convert     atm  
1 atm =
Energy density
  Symbol Unit Name
2.71948  Btu (IT)/ft3  British thermal unit (IT) per cubic foot 
0.436596  Btu (IT)/gal (UK)  British thermal unit (IT) per gallon (UK) 
0.363542  Btu (IT)/gal (US)  British thermal unit (IT) per gallon (US) 
1.01325×105  J/m3  joule per cubic meter 
101.325  kJ/m3  kilojoule per cubic meter 
12.7329  MGOe  megagauss-oersted (MGOe) 
Pressure
  Symbol Unit Name
1.03323  at  atmosphere (metric) 
atm  atmosphere (standard) 
1.01325  bar  bar 
1.01325×106  barad  barad 
1.01325×106    barye 
76    centiHg (0°C) 
76  cmHg (0 °C)  centimeter of mercury (0°C) 
1033.26  cmH2O  centimeter of water (4°C) 
1.01325×106  dyn/cm2  dyne per square centimeter 
33.8995  ft H2O  foot of water (4°C) 
1.01325×10-4  GPa  gigapascal 
1013.25  hPa  hectopascal 
29.9213  inHg (0 °C)  inch of mercury (0°C) 
30.0028  inHg (15.56 °C)  inch of mercury (15.56°C) 
407.181  inH2O (15.56 °C)  inch of water (15.56°C) 
406.794  inH2O (4 °C)  inch of water (4°C) 
1.03323  kgf/cm2  kilogram force per square centimeter 
103.323  kgf/dm2  kilogram force per square decimeter 
1.03323×104  kgf/m2  kilogram force per square meter 
1.03323×10-2  kgf/mm2  kilogram force per square millimeter 
101.325  kPa  kilopascal 
1.46959×10-2  kip/in2, ksi, KSI  kilopound force per square inch 
0.101325  MPa  megapascal 
10.3424  mH2O, mCE (15.56 °C)  meter of water (15.56°C) 
10.3326  mH2O, mCE (4 °C)  meter of water (4°C) 
1.01325×106  µbar  microbar (barye, barrie) 
7.6×105  µHg (0 °C)  micron of mercury (millitorr) 
1013.25  mbar  millibar 
760  mmHg, torr, Torr (0 °C)  millimeter of mercury (0°C) 
1.03424×104  mmH2O, mmCE (15.56 °C)  millimeter of water (15.56°C) 
1.03326×104  mmH2O, mmCE (4 °C)  millimeter of water (4°C) 
7.6×105  mtorr  millitorr 
1.01325×105  N/m2  newton per square meter 
235.135  ozf/in2, osi  ounce force (av.) per square inch 
1.01325×105  Pa, N/m2  pascal 
2116.22  lbf/ft2  pound force per square foot 
14.6959  psi, PSI, lbf/in2  pound force per square inch 
6.80873×104  pdl/ft2  poundal per square foot 
472.828  pdl/in2  poundal per square inch 
0.94474  tonf/ft2 (UK)  ton force (long) per square foot 
6.56069×10-3  tonf/in2 (UK)  ton force (long) per square inch 
1.03323×10-3  tonf/cm2 (metric)  ton force (metric) per square centimeter 
10.3323  tonf/m2 (metric)  ton force (metric) per square meter 
1.05811  tonf/ft2 (US)  ton force (short) per square foot 
7.34797×10-3  tonf/in2 (US)  ton force (short) per square inch 
760  torr  torr 
Glossary
Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.