Definition:Standard Atmospheric Pressure

Definition

The standard atmospheric pressure is the quantity of pressure defined as

$\ds P_0$

$=$

$\ds 1$

standard atmosphere

$\ds $

$=$

$\ds 1 \cdotp 01325 \times 10^5$

pascals

$\quad$ in SI units

$\ds $

$=$

$\ds 1 \cdotp 01325 \times 10^6$

dynes per square centimetre

$\quad$ in CGS units

$\ds $

$=$

$\ds 1 \cdotp 01325 \times 10^3$

millibars

$\ds $

$=$

$\ds 760$

millimetres of mercury

$\ds $

$\approx$

$\ds 14 \cdotp 696$

pounds per square inch

$\quad$ in FPS units

It is roughly equivalent to the mean sea-level atmospheric pressure on Earth.