Shower Cost Calculator
Calculate the water and energy cost of your daily shower.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Request a ToolHow to Use the Shower Cost Calculator
Calculate the true cost of your shower by adjusting four variables:
- Shower duration. Enter how many minutes you typically shower. The average American shower is about 8 minutes.
- Flow rate. Standard showerheads use 2.0-2.5 gallons per minute (GPM). Low-flow showerheads use 1.5-2.0 GPM. WaterSense-certified heads use 2.0 GPM or less. Check your showerhead specifications or look it up by model.
- Water rate. Find your water rate on your utility bill (usually shown as cost per 1,000 gallons or CCF). The US average is about $5 per 1,000 gallons.
- Electricity rate. Find your rate on your electricity bill. The US average is about $0.12-0.16 per kWh.
About Shower Costs
A typical 8-minute shower with a 2.0 GPM showerhead uses 16 gallons of water. The water cost at average US rates is about $0.08. The energy cost to heat that water adds another $0.05-0.10. Total cost per shower is typically $0.10-0.20, or $36-73 per year for one person showering daily.
The energy calculation assumes a standard electric water heater heating cold water (60°F) to shower temperature (105°F), requiring approximately 0.35 kWh per 10 gallons heated. Gas water heaters are generally cheaper to operate. The primary lever for reducing shower cost is shower duration, followed by upgrading to a low-flow showerhead.
Frequently Asked Questions
How much does a 10-minute shower cost?
A 10-minute shower with a standard 2.0 GPM showerhead uses 20 gallons of water. At average US rates of $5 per 1,000 gallons, the water cost is $0.10. Adding the energy cost to heat that water (approximately $0.08-0.12 for an electric water heater), the total cost is roughly $0.18-0.22 per shower. Monthly, that is about $5.40-$6.60 for one person, and $21-26 for a family of four.
Does a low-flow showerhead really save money?
Yes, significantly. Replacing a 2.5 GPM showerhead with a 1.5 GPM WaterSense-certified model reduces water use by 40% per shower. For a family of four each showering 8 minutes daily, this saves roughly 4,600 gallons per month and can reduce shower-related water and energy costs by $25-50 per year. Low-flow showerheads cost $20-80 and typically pay for themselves within a few months.
Is a shower cheaper than a bath?
A standard bathtub holds 36-50 gallons of water. A 5-minute shower with a 2.0 GPM showerhead uses only 10 gallons, making showers much cheaper for short durations. However, a long 20-minute shower uses 40 gallons, comparable to a full bath. The break-even point is approximately 10-15 minutes of showering. Showers under 10 minutes are almost always cheaper than filling a tub.
How do I find my water rate?
Your water rate appears on your monthly utility bill, typically expressed as dollars per 1,000 gallons (kgal) or per CCF (hundred cubic feet, equal to 748 gallons). Divide the total water charge by your total usage in thousands of gallons to get your effective rate. US rates range from about $2 to $15 per 1,000 gallons depending on location, with the national average around $5. Many utility websites also list rate schedules online.