Shower Cost Calculator
Calculate the cost of each shower based on water usage, heating energy, and shower duration.
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Cost Per Shower
Shower cost combines water cost and the energy to heat that water.
Water Used = Shower Minutes x Flow Rate (gal/min)
Water Cost = Water Used x Water Rate (per gallon)
Energy Cost = Water Used x 8.33 x Temp Rise x (1 / Heater Efficiency) / 100,000 x Fuel Cost
Typical flow rates:
- Standard showerhead: 2.5 gal/min (9.5 L/min)
- Low-flow showerhead: 2.0 gal/min (7.6 L/min)
- Ultra low-flow: 1.5 gal/min (5.7 L/min)
- Rain showerhead: 2.5-3.0 gal/min
Average water costs (US): $0.005-0.015 per gallon
Temperature rise: Typically from ~55degF (13degC) incoming to 105degF (41degC) shower temp = 50degF rise.
A typical 8-minute shower costs $0.50-$1.50 depending on your region and energy source.