This shower cost calculator estimates the cost of taking a shower by considering main inputs, shower length, flow rate, cost of water, and cost of energy per gallon.
- Duration of the shower (in minutes)
- Flow rate of the showerhead (in gallons or liters per minute)
- Cost of water (per gallon or liter)
If you take a 10-minute shower with a flow rate of 2.5 gallons per minute and the cost of water is $0.005 per gallon, the total water used would be:
Total Water Used = Duration × Flow Rate = 10 minutes × 2.5 gallons/minute = 25 gallons
The total cost of the shower would then be:
Total Cost = Total Water Used × Cost per Gallon = 25 gallons × 0.005 dollars/gallon = 0.125 dollars
Shower Cost Calculator
| Duration | Water Usage (gal) | Water Cost | Energy Usage (kWh) | Energy Cost | Total Cost | Frequency (per week) | Weekly Cost | Monthly Cost | Yearly Cost |
|---|---|---|---|---|---|---|---|---|---|
| 2 min | 4.2 | $0.063 | 1.386 | $0.18018 | $0.24318 | 7 | $1.71 | $7.38 | $88.56 |
| 5 min | 10.5 | $0.1575 | 3.465 | $0.45045 | $0.60795 | 7 | $4.26 | $18.36 | $220.32 |
| 8 min | 16.8 | $0.252 | 5.544 | $0.72072 | $0.97272 | 7 | $6.81 | $29.27 | $351.24 |
| 10 min | 21 | $0.315 | 6.93 | $0.9009 | $1.2159 | 7 | $8.51 | $36.63 | $439.56 |
| 15 min | 31.5 | $0.4725 | 10.395 | $1.35135 | $1.82385 | 7 | $12.77 | $55.27 | $663.24 |
| 20 min | 42 | $0.63 | 13.86 | $1.8018 | $2.4318 | 7 | $17.03 | $73.02 | $876.24 |
| 30 min | 63 | $0.945 | 20.79 | $2.7027 | $3.6477 | 7 | $25.53 | $110.96 | $1,331.52 |
| 40 min | 84 | $1.26 | 27.72 | $3.366 | $4.626 | 7 | $32.38 | $139.18 | $1,669.92 |
| 60 min | 126 | $1.89 | 41.58 | $5.4054 | $7.2954 | 7 | $51.07 | $220.01 | $2,640.12 |
| 90 min | 189 | $2.84 | 62.37 | $8.0841 | $10.9251 | 7 | $76.47 | $329.48 | $3,973.76 |
Shower Cost Calculator Calculation Formula
Cost = (Water Usage × Water Rate) + (Energy Usage × Energy Rate)
Where:
- Water Usage = Flow Rate (gallons per minute) × Duration (minutes)
- Energy Usage = Energy required to heat water × Duration (minutes)
For example…
- Water Usage: If a showerhead has a flow rate of 2 gallons per minute and the shower lasts 10 minutes: Water Usage = 2 gal/min × 10 min = 20 gallons
- Water Cost: The water rate is $0.015 per gallon: Water Cost = 20 gallons × $0.015/gal = $0.30
- Energy Usage: Assuming it takes 0.33 kWh to heat one gallon of water: Energy Usage = 20 gallons × 0.33 kWh/gal = 6.6 kWh
- Energy Cost: Electricity costs $0.12 per kWh: Energy Cost = 6.6 kWh × $0.12/kWh = $0.792
- Total Cost: Water Cost + Energy Cost = $0.30 + $0.792 = $1.092
How Do You Calculate the Cost of a Shower?
To calculate the cost of a shower:
- Calculate water cost: Multiply water usage by your local water rate.
- Estimate energy usage: Calculate the energy required to heat the water used.
- Determine energy cost: Multiply energy usage by your local energy rate.
- Sum up total cost: Add water cost and energy cost.
Example: Let’s say you have a 2.1 gallon per minute showerhead and take an 8-minute shower. Your water rate is $0.01 per gallon, and electricity costs $0.15 per kWh.
Water usage: 2.1 gal/min × 8 min = 16.8 gallons
Water cost: 16.8 gal × $0.01/gal = $0.168
Energy usage: 16.8 gal × 0.33 kWh/gal = 5.544 kWh
Energy cost: 5.544 kWh × $0.15/kWh = $0.8316
Total cost: $0.168 + $0.8316 = $0.9996
How Much Does a 10 Minute Shower Cost?
A 10-minute shower costs approximately $1.22.
Let’s use average figures for this example:
- Average flow rate: 2.1 gallons per minute
- Water rate: $0.015 per gallon
- Energy rate: $0.13 per kWh
- Water usage: 2.1 gal/min × 10 min = 21 gallons
- Water cost: 21 gal × $0.015/gal = $0.315
- Energy usage: 21 gal × 0.33 kWh/gal = 6.93 kWh
- Energy cost: 6.93 kWh × $0.13/kWh = $0.9009
- Total cost: $0.315 + $0.9009 = $1.2159
How Much Does a Shower Cost Per Minute?
A 10-minute shower costing $0.125
Cost per minute = Total cost / Duration
= $1.2159 / 10 minutes
= $0.12159 per minute
This means that each minute of this shower costs about 12 cents.
To calculate the cost per minute, we can divide the total cost of a shower by its duration.
How Much Does a 5 Minute Shower Cost?
A 5-minute shower would cost approximately $0.61.
Water usage: 2.1 gal/min × 5 min = 10.5 gallons
Water cost: 10.5 gal × $0.015/gal = $0.1575
Energy usage: 10.5 gal × 0.33 kWh/gal = 3.465 kWh
Energy cost: 3.465 kWh × $0.13/kWh = $0.45045
Total cost: $0.1575 + $0.45045 = $0.60795
How Much Does a 1 Hour Shower Cost?
A 1-hour shower costs approximately $7.30.
Water usage: 2.1 gal/min × 60 min = 126 gallons
Water cost: 126 gal × $0.015/gal = $1.89
Energy usage: 126 gal × 0.33 kWh/gal = 41.58 kWh
Energy cost: 41.58 kWh × $0.13/kWh = $5.4054
Total cost: $1.89 + $5.4054 = $7.2954
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