已知一大氣壓約等於1.01×10 5牛頓/公尺2

Pressure at 10 m depth
= 10g x 1000 N/m^2 = 98100 N/m^2
[where g is the acceleration due to gravity, taken to be 9.81 m/s^2, and 1000 kg/m^3 is the density of water]

Hnece, no. of atmospheric pressure
= 98100/1.01x10^5 = 0.97