# What is the basic difference between absolute pressure and gauge pressure? [duplicate]

What is the basic difference between absolute pressure and gauge pressure?

So suppose you are in an ocean at height depth,your absolute pressure would be $Patm+\rho*g*d$ while your guage pressure would be simply $\rho*g*d$, also you can say if at any point your total pressure is P your absolute pressure is $P$ while your guage pressure is $P - Patm$