Everyday life

Shower Cost Calculator

Estimate the water cost of a shower.

Shower length

Flow rate (gpm)

Water cost per gallon ($)

Calculated Output

Water cost ($) 0.0672

Water used (gal) 16.8

Formula: gallons = minutes × flow ; cost = gallons × price

Step-by-Step Breakdown

1. Values used:

2. Shower length = 8

3. Flow rate = 2.1 gpm

4. Water cost per gallon = 0.004 $

6. Water cost = Shower length x Flow rate x Water cost per gallon = 8 x 2.1 x 0.004 = 0.0672$

7. Water used = Shower length x Flow rate = 8 x 2.1 = 16.8gal

Did this calculator solve your problem today?

The math behind it

gallons = minutes × flow rate; cost = gallons × price per gallon. Add heating cost separately.

8 min at 2.1 gpm → 16.8 gal (~$0.07).

Heating cost?

Hot water also costs energy — often more than the water itself.