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Orders of magnitude (pressure): Wikis


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This is a tabulated listing of the orders of magnitude in relation to pressure expressed in pascals.

Magnitude Pressure lbf/in2 Item
10−15 Pa
1 fPa Interstellar space pressure (approximate)
10−12 Pa
1 pPa
10−11 Pa
13.3 pPa Lowest obtainable pressure in laboratory conditions (as of January 2009).[1]
40 pPa Atmosphere of the Moon at lunar day, very approximately (4 x 10-11 Pa)[2]
10−10 Pa
100 pPa Atmosphere of Mercury according to NASA's factsheet, very approximately (1 x 10-10 Pa)[3]
800 pPa Atmosphere of the Moon at lunar night, very approximately (80 x 10-11 Pa)[2]
10−9 Pa
1 nPa vacuum expected in the beam pipe of the Large Hadron Collider's Atlas experiment[4]
10−8 Pa
10 nPa
10−7 Pa
200 nPa Atmosphere of Mercury according to NASA's worldbook, approximately (2.0 × 10-7 Pa)[5]
10−6 Pa
1 µPa Pressure inside a vacuum tube (approximate, varies). Reference pressure for sound in water.
10 µPa Radiation pressure of sunlight on a perfectly reflecting surface at the distance of the Earth.[6]
20 µPa Threshold of human hearing - the smallest RMS pressure fluctuation that the human ear can hear in a noiseless environment, at frequencies between 1 kHz and 5 kHz.

Reference pressure for sound in air.

100 µPa Near Earth outer space pressure (approximate)
10−3 Pa
0.5 mPa Atmospheric pressure on Pluto (1988 figure; very roughly)
1 Pa
1 Pa Pressure exerted by a UK five pound note resting on a surface [7]
10 Pa Pressure increase per millimeter of a water column at Earth mean sea level.
10 Pa Pressure inside an incandescent light bulb (approximate)
100 Pa Threshold of pain. Sounds above this amplitude are unbearable and can cause ear pain. Prolonged exposure may lead to hearing loss.
611.73 Pa Partial vapour pressure at the triple point of water
103 Pa
1 kPa 0.145 psi Atmospheric pressure on Mars, 1 % of atmospheric sea-level pressure on Earth
6.894757 kPa 1 psi 1 pound-force per square inch
10 kPa 1.45 psi Pressure increase per meter of a water column1, or the drop in air pressure when going from Earth sea level to 1000 m elevation
100 kPa
14.5038 psi 1 bar[8]
101.325 kPa
14.696 psi Standard atmospheric pressure for Earth sea level
180 to 250 kPa 26 to 36 psi Air pressure in an automobile tire relative to atmosphere (gauge pressure)
407 to 607 kPa 59 to 88 psi Air pressure in a champagne bottle[9].
400 to 500 kPa 58 to 73 psi Typical UK pressures domestic mains water supply.
517 kPa 75 psi Partial vapour pressure at the triple point of carbon dioxide.
600 to 800 kPa Air pressure in a bicycle tire relative to atmosphere (gauge pressure)
690 to 828 kPa 100 to 120 psi Air pressure in a heavy truck/bus tire relative to atmosphere (gauge pressure)
106 Pa
0.8 to 2 MPa 120 to 290 psi Pressure used in boilers of steam locomotives
9 MPa 1305 psi Atmospheric pressure on Venus (90 bar)
10 MPa 1450 psi Pressure washers force out water at this pressure
12 MPa 1740 psi Pressure exerted by a 60 kg woman wearing stilettos
12.7 MPa 1850 psi Pressure exerted from a punch by Ivan Drago in Rocky IV
20 MPa 2900 psi Pressure of a typical aluminium scuba tank or pressurized gas cylinders. (200 bar)
100 MPa 14500 psi Pressure at bottom of Mariana Trench, about 10 km below ocean surface (1000 bar)
400 MPa Chamber pressure of .50 BMG weapon discharge
600 MPa Water pressure used in a water jet cutter.
109 Pa
9 GPa Pressure at which octaoxygen forms [10] (90000 bar)
18 GPa Pressure needed for the first commercially successful synthesis of diamond
96 GPa Pressure at which metallic oxygen forms[11] (960000 bar)
100 GPa Theoretical tensile strength of a carbon nanotube (CNT)
130 GPa Intrinsic strength of monolayer graphene[12]
380 GPa Pressure inside the core of the Earth (3.8 million bar)
1012 Pa
530 TPa Pressure inside an Ivy Mike-like nuclear bomb detonation (5.3 billion bar)
1015 Pa
6.4 PPa Pressure inside a W80 nuclear warhead detonation (64 billion bar)
25 PPa Pressure inside the core of the Sun.[13] (250 billion bar)
10111 Pa 4.63 × 10113 Pa The Planck pressure (4.63x10108 Bar)
Orders of magnitude
area angular velocity charge currency data density energy
force frequency length magnetic field mass numbers power
pressure specific energy density specific heat capacity speed temperature time volume
Conversion of units
physical unit SI SI base unit SI derived unit SI prefix Planck units


  1. ^ Ishimaru, H. (1989). "Ultimate Pressure of the Order of 10-13 Torr in an Aluminum Alloy Vacuum Chamber". Journal of Vacuum Science and Technology 7 (3): 2439–2442.  
  2. ^ a b "WikiAnswers -". Retrieved 2009-09-26.  
  3. ^ "Mercury Fact Sheet". Archived from the original on 2008-07-24.  
  4. ^ CERN. Bringing the vacuum to its lowest value. 2008-07-28. Retrieved 2008-09-14
  5. ^ "NASA - Mercury". Retrieved 2009-09-26.  
  6. ^ G. Vulpetti, L. Johnson, G. L. Matloff, Solar Sails: A Novel Approach to Interplanetary Flight, Springer, August 2008
  7. ^ "Microbe experiment suggests we could all be Martians", The Guardian 2007-01-13, accessed 2008-03-23
  8. ^ Gershtein, Sergey; Anna Gershtein. "bar. Metric. Stress and Pressure Conversion Chart". Retrieved 2009-09-26.  
  9. ^ The Physics Factbook
  10. ^ Fujihisa et al. (2006)
  11. ^ 2008
  12. ^ Properties and Intrinsic strength of Monolayer Graphene
  13. ^ Williams, David R. (September 1, 2004). "Sun Fact Sheet". NASA. Retrieved 2008-01-23.  




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