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What is the definition of pressure?
In simple words, the meaning of the word pressure can be said to be the force which is applied in a perpendicular direction to that of the surface of a certain object that too per unit area over which the same force has been distributed. Moreover, pressure is represented by the symbol, p or P. on the other hand, the gauge pressure turns out to be a pressure which is relative to ambient pressure. Finally, a number of units are put in to use in order to express pressure.
Pressure Converter
Formulae used to convert pressure
 The mathematical formula which is generally used in pressure conversion has been listed below –
\(P=\frac{F}{A}\)
In the above equation, p happens to be the pressure whereas F is stated to be the normal force & A represents the area of the surface on contact.
 In addition to this, as pressure is a scalar quantity, the equation that has been mentioned below is also taken in to consideration –
\(dF_n= pdA= pndA\)
 When the pressure is to be represented in the form of units & especially in the form of joules per cubic metre (J / m^{3}, which is equal to Pa), pressure is mathematically defined in the following manner –
\(p\,= \,\frac{F \times distance}{A \times distance}\,=\,\frac{Work}{Volume}\,=\, \,\frac {Energy(J)}{Volume (m^3 ) }\)
 In addition to this, the equation for all the points of the system that is filled by that of a constant – density fluid happens to be as follows –
\(\frac{p}{\gamma} \, + \, \frac {\nu^2}{2g}+z=const\)
In the above equation, is the pressure of the fluid while \(\gamma=pg\) happens to be the density multiplied by acceleration of the gravity = specific weight of the fluid. \(v \)= velocity of fluid &\(g\) is the acceleration of the gravity, \(z\) is the elevation. On the other hand,\(\frac {p}{\gamma}\) is nothing but the pressure head & the velocity head is represented by the following term – \(\frac{v^2}{2b}.\)
 Static pressure & the stagnation pressure are related by the following equation –
\(p_0= \frac{1}{2}\rho\nu^2+p\)
In the above equation, happens to be the stagnation pressure & it is followed by which is the flow velocity whereas the static pressure is denoted by .
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Boyle’s law
\(\pi A = k\)

Surface pressure
\(\pi =\frac{F}{l}\)

Pressure of an ideal gas
\(p=\frac{nRT}{V}\)
Here, p = absolute pressure of gas, n = amount of substance, T = absolute temperature, R = ideal gas constant & V = volume.

Liquid pressure
\(p=\rho g h\)
Here, = liquid pressure, = density of the liquid, = gravity at surface of overlaying material & = height of liquid column or even the depth within the substance
This formula can also be written in the following manner –
\(p\,=\, weight\, density \,\times \,depth\)

Bernoulli’s equation
\(\frac{p}{\gamma}+z=const\)

Kinematic pressure
\( P\,=\, \frac{p}{\rho_0}\)

Navier – Stokes equation with kinematic quantities
\( \frac{\partial u}{\partial t} + (u\bigtriangledown)u= – \bigtriangledown P\,+\,v\bigtriangledown^2 u\)
How to use a pressure converter?
To make use of this online pressure converter, you will have to first enter the details & select the unit before you click on the calculate tab to know the answer.