The following 42 Units are included in this category:
ID |
Unit (symbol) |
Definition |
Wikipedia page and other notes |
1 |
atmosphere [technical] (at) |
98,066.5 Pa |
https://en.wikipedia.org/wiki/Technical_atmosphere The same as “kilogram-f per sq. cm” |
2 |
atmosphere [standard] (atm) |
101,325 Pa |
|
3 |
barye (Ba) |
10-1 Pa |
https://en.wikipedia.org/wiki/Barye The same as “dyne per sq. centimetre” |
4 |
bar (bar) |
105 Pa |
|
5 |
centimetre of water [conv.] (cmAq) |
98.0665 Pa |
https://en.wikipedia.org/wiki/Centimetre_or_millimetre_of_water |
6 |
centimetre of mercury [conv.] (cmHg) |
1333.22387415 Pa |
|
7 |
dyne per sq. centimetre (dyn/cm2) |
10-1 Pa |
https://en.wikipedia.org/wiki/Barye The same as “barye” |
8 |
dyne per sq. metre (dyn/m2) |
10-5 Pa |
|
9 |
foot of water [conv.] (ftAq) |
2989.06692 Pa |
|
10 |
foot of mercury [conv.] (ftHg) |
40,636.663684092 Pa |
|
11 |
gigabar (Gbar) |
1014 Pa |
https://en.wikipedia.org/wiki/Bar_(unit) Page refers to bar |
12 |
giganewton per sq. metre (GN/m2) |
109 Pa |
https://en.wikipedia.org/wiki/Pascal_(unit)#Multiples_and_submultiples |
13 |
gigapascal (GPa) |
109 Pa |
https://en.wikipedia.org/wiki/Pascal_(unit)#Multiples_and_submultiples |
14 |
hectopascal (hPa) |
102 Pa |
https://en.wikipedia.org/wiki/Pascal_(unit)#Multiples_and_submultiples |
15 |
inch of water [conv.] (inAq) |
249.08891 Pa |
|
16 |
inch of mercury [conv.] (inHg) |
3386.388640341 Pa |
|
17 |
kilobar (kbar) |
108 Pa |
https://en.wikipedia.org/wiki/Bar_(unit) Page refers to bar |
18 |
kilogram-f per sq. cm (kgf/cm2) |
98,066.5 Pa |
https://en.wikipedia.org/wiki/Kilogram-force_per_square_centimetre The same as “Technical atmosphere” |
19 |
kilogram-f per sq. metre (kgf/m2) |
9.80665 Pa |
|
20 |
kilonewton per sq. centimetre (kN/cm2) |
107 Pa |
|
21 |
kilonewton per sq. metre (kN/m2) |
103 Pa |
https://en.wikipedia.org/wiki/Pascal_(unit)#Multiples_and_submultiples |
22 |
kilonewton per sq. millimetre (kN/mm2) |
109 Pa |
|
23 |
kilopascal (kPa) |
103 Pa |
https://en.wikipedia.org/wiki/Pascal_(unit)#Multiples_and_submultiples |
24 |
kilopound-force per sq. foot (ksf) |
(103/144) psi |
|
25 |
kilopound-force per sq. inch (ksi) |
103 psi |
https://en.wikipedia.org/wiki/Pounds_per_square_inch#Multiples |
26 |
millibar (mbar) |
102 Pa |
https://en.wikipedia.org/wiki/Bar_(unit) Page refers to bar |
27 |
megabar (Mbar) |
1011 Pa |
https://en.wikipedia.org/wiki/Bar_(unit) Page refers to bar |
28 |
millimetre of water [conv.] (mmAq) |
9.80665 Pa |
https://en.wikipedia.org/wiki/Centimetre_or_millimetre_of_water Conventionally, the density 1,000 kg/m3 is used for water for this definition, which is the approximate density of water at 4 °C (39.2 °F), and 9.80665 m/s2 is standard gravity: 1000*9.80665 = 9806.65 for 1 metre of water Note: The maximum density of water is 999.972 kg/m3 at a temperature of 3.98 °C (39.164 °F) but conventionally we use a value of 1000 kg/m3 for water for the definition of this unit |
29 |
millimetre of mercury [conv.] (mmHg) |
133.322387415 Pa |
https://en.wikipedia.org/wiki/Millimeter_of_mercury Conventionally, the density 13,595.1 kg/m3 is used for mercury for this definition, which is the approximate density of mercury at 0 °C (32 °F), and 9.80665 m/s2 is standard gravity: 13595.1*9.80665 = 133,322.387415 for 1 metre of mercury
|
30 |
meganewton per sq. metre (MN/m2) |
106 Pa |
https://en.wikipedia.org/wiki/Pascal_(unit)#Multiples_and_submultiples |
31 |
megapascal (MPa) |
106 Pa |
https://en.wikipedia.org/wiki/Pascal_(unit)#Multiples_and_submultiples |
32 |
megapound-force per sq. foot (Mpsf) |
(106/144) psi |
|
33 |
megapound-force per sq. inch (Mpsi) |
106 psi |
https://en.wikipedia.org/wiki/Pounds_per_square_inch#Multiples |
34 |
newton per sq. centimetre (N/cm2) |
104 Pa |
|
35 |
newton per sq. metre (N/m2) |
1 Pa |
https://en.wikipedia.org/wiki/Pascal_(unit) The same as pascal |
36 |
newton per sq. millimetre (N/mm2) |
106 Pa |
|
37 |
pascal (Pa) |
- |
https://en.wikipedia.org/wiki/Pascal_(unit) The same as newton per sq. metre |
38 |
pound-force per sq. foot (psf) |
(1/144) psi |
|
39 |
pound-force per sq. inch (psi) |
(444,822,161.52605/64,516) Pa |
https://en.wikipedia.org/wiki/Pounds_per_square_inch The same as lbf/in2 |
40 |
pièze (pz) |
103 Pa |
|
41 |
torr (Torr) |
(1/760) atm |
|
42 |
microbar (μbar) |
10-1 Pa |
https://en.wikipedia.org/wiki/Bar_(unit) Page refers to bar |
All the above definitions of the various units are EXACT.
Note that for the units based on mercury (millimetre of mercury [conv.] (mmHg), centimetre of mercury [conv.] (cmHg), inch of mercury [conv.] (inHg), foot of mercury [conv.] (ftHg)) and the units based on water (millimetre of water [conv.] (mmAq), centimetre of water [conv.] (cmAq), inch of water [conv.] (inAq), foot of water [conv.] (ftAq)), other similar definitions can be found in the literature, referring to different base temperatures, as the density of the material depends on its temperature. In the above we have used the conventional values that can be found in the literature.
Note: In the above, a period (.) is used to indicate the decimal place and a comma (,) is used to separate groups of thousands.
Type of conversion relationship: DIRECTLY PROPORTIONAL (y=a∙x)
Example conversion diagram (see unit in red above):
