Compare shorter sessions on an electric shower
A person using an instantaneous electric shower wants the energy effect of cutting their daily session from eight minutes to six. Enter 8 ÷ 60 and 6 ÷ 60 as decimal hours.
Open CalculatorInputs and calculation
| Tool input | Value |
|---|---|
| Currency | USD |
| Power unit | W |
| Power | 9000 |
| Hours per day | 0.133333333333 |
| Days or equivalent sessions | 30 |
| Duty cycle (%) | 100 |
| Energy price (USD per input kWh) | 0.25 |
| Alternative power (W) | 9000 |
| Alternative hours per day | 0.1 |
| Alternative duty cycle (%) | 100 |
Baseline: 9000 ÷ 1,000 × (8/60) × 30 × 100% = 36 kWh. Alternative: 9000 ÷ 1,000 × 0.1 × 30 × 100% = 27 kWh. Multiply both by 0.25; the baseline minus the alternative is USD 2.25.
Modeled difference · USD 2.25
What the comparison shows
At an illustrative 7 L/min, 8 minutes uses 1,680 L over 30 days and 6 minutes uses 1,260 L. The electricity estimate is 9.00 versus 6.75. Neither result accounts for a different shower temperature.
Assumptions and limits
This is a constant-power example for an electric shower. The Simulator estimates electricity. Use the Household Water Usage Calculator for water volume.