The average GPM or gallons per minute of a shower is around 2.1 gallons per minute.
Of course the GPM or gallons per minute of a shower can also vary depending on the shower head you have.
If you have a larger flow shower head your shower might use 3 gallons of water per minute while a lower flow shower head will use around 2.1 gallons of water per minute.
The amount of gallons of water that your shower uses for each shower also depends on the amount of time you are in the shower.
Longer showers will use more water than shorter showers will.
Yes a bigger shower head with bigger holes uses more water than a smaller shower head with smaller holes for the water to flow through.
The bigger the shower head the more water that will flow through it and you'll use more gallons of water for the same time of shower.
If you want to save water when taking a shower you can get a smaller shower head that is lower flow and less GPM.
Hardware stores sell water saving shower heads and they do save water and if you're on city water and are billed for your water then the cost of the water saving shower head will save you money as you use less water per shower.
The average shower and shower head uses around 2.1 gallons of water per minute.
And if you get a lower flow shower head it may only use 1.1 gallons of water per minute which can save you on your water bill.
Shower heads do not increase the water pressure coming into your shower.
However a different shower head that uses less water can give you more pressure through the shower head so that you don't have low water pressure coming out the shower head.
What I mean by that is that it makes it seem like there's more pressure coming out of the shower head because the holes in the shower head where the water comes out are smaller.
That gives the shower a bit more pressure per say so that you get a better spray out the shower head and a better shower.
With a bigger flow shower head and lower water pressure the water may not spray out of the shower head properly to give you a good shower.
Choosing a water saving shower head for low water pressure can help give you more spray of water out of the shower head.