 Online Calculators

# Pressure Conversion Calculator

Convert Pressure

a real number or scientific notation

## Calculator Use

Pressure is a scalar quality reflecting how force acts on a surface.

P = F/A

Where P is equal to pressure, F is the normal force and A is area. Since pressure is derived from force and area, many units for pressure directly relate force to area. Some are obvious, such as pounds per square inch, but even the SI standard Pascal is actually an expression of one Newton per square meter.

## How to Convert Units of Pressure

Conversions are performed by using a conversion factor. By knowing the conversion factor, converting between units can become a simple multiplication problem:

S * C = E

Where S is our starting value, C is our conversion factor, and E is our end converted result.

To simply convert from any unit into pascals, for example, from 5 bar, just multiply by the conversion value in the right column in the table below.

5 bar * 100000 [ (Pa) / (bar) ] = 500000 Pa

To convert from Pa into units in the left column divide by the value in the right column or, multiply by the reciprocal, 1/x.

500000 Pa / 100000  [ (Pa) / (bar) ] = 5 bar

To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into Pascals then divide by the factor for B to convert out of Pascals.  Or, you can find the single factor you need by dividing the A factor by the B factor.

For example, to convert from bar to pounds per square inch you would multiply by 100000 then divide by 6894.757.  Or, multiply by 100000/6894.757 = 14.503774. So, to convert directly from bar to pounds per square inch, you multiply by 14.503774.

Units, symbols and conversion values
used in this pressure calculator
To Convert from
Unit
Unit
Symbol
and Convert to
(Pa )
Multiply by
(Pa / Unit)
atmosphere-standard
atm
pascal
101325
atmosphere-technical
at
pascal
98066.5
bar
bar
pascal
100000
decibar
dbar
pascal
1000
millibar
mbar
pascal
100
barye (cgs unit)
barye
pascal
0.1
centimeter of mercury
cmHg
pascal
1333.22
centimeter of water (4 °C)
cmH2O
pascal
98.0638
foot of mercury (conventional)
ftHg
pascal
40636.66
foot of water (39.2 °F)
ftH2O
pascal
2988.98
inch of mercury (conventional)
inHg
pascal
3386.389
inch of water (39.2 °F)
inH2O
pascal
248.082
kilogram-force per square millimeter
kgf/mm2
pascal
9806650
kip per square inch
kip/in2
pascal
6894757
millimeter of mercury
mmHg
pascal
133.3224
millimeter of water (3.98 °C)
mmH2O
pascal
9.80638
pascal
Pa
pascal
1
hectopascal
hPa
pascal
100
kilopascal
kPa
pascal
1000
pound per square foot
lb/ft2
pascal
47.88025
pound per square inch
lb/in2 or psi
pascal
6894.757
poundal per square foot
pdl/ft2
pascal
1.488164
short ton per square foot
sh tn/ft2
pascal
95760.518
torr
torr
pascal
133.3224

The National Institute of Standards and Technology (NIST) - The NIST Guide for the use of the International System of Units - Appendix B, subsections B.8 Factors for Units Listed Alphabetically and B.9 Factors for units listed by kind of quantity or field of science.

Lide, David R., Daniel (Editor-in-Chief). CRC Handbook of Chemistry and Physics, 89th Edition New York, NY: CRC Press, p. 1-28, 2008.

Wikipedia contributors. "Conversion of units" Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, last visited 26 Jun. 2011.

How Many? A dictionary of units of measurement at http://www.unc.edu/~rowlett/units/

Cite this content, page or calculator as:

Furey, Edward "Pressure Conversion Calculator"; CalculatorSoup, https://www.calculatorsoup.com - Online Calculators