Laundry Energy and Water Cost Calculator
Estimate variable utility costs from wash frequency and the values on appliance or tariff information. The tool shows the method and key assumptions so you can inspect how the input values lead to the estimate.
How to use this calculator
- Enter wash cycles per week using the unit and definition shown beside the input.
- Enter electricity per cycle (kwh) using the unit and definition shown beside the input.
- Enter electricity price per kwh using the unit and definition shown beside the input.
- Check that all values refer to the same time period and scenario.
- Review the outputs alongside the assumptions before using them in a decision.
Formula and assumptions
Electricity cost=cycles×weeks×kWh/cycle×price/kWh; water cost=cycles×weeks×litres/cycle/1000×price/m³.
- Use the actual programme, temperature, machine and local tariff. Detergent, drying, maintenance and fixed utility charges are excluded unless you add them to another cost line.
- The estimate is calculated from values you enter. It does not connect to external accounts, obtain live prices, or validate local regulations or engineering specifications.
Worked examples
Worked example
Five weekly cycles over 52 weeks at 0.75 kWh/cycle and 0.32 per kWh use 195 kWh before the water component.
Enter expected cycles, machine energy and water use, local unit rates and the time horizon.
Label the currency and tariff period when saving or comparing results.
Understanding the result
Use the actual programme, temperature, machine and local tariff. Detergent, drying, maintenance and fixed utility charges are excluded unless you add them to another cost line.
Change one input at a time to see how sensitive the output is to that assumption.
Important notes
Use the actual programme, temperature, machine and local tariff. Detergent, drying, maintenance and fixed utility charges are excluded unless you add them to another cost line.
Frequently asked questions
What formula does the Laundry Energy and Water Cost Calculator use?
Electricity cost=cycles×weeks×kWh/cycle×price/kWh; water cost=cycles×weeks×litres/cycle/1000×price/m³.
What should I verify before relying on the result?
Use the actual programme, temperature, machine and local tariff. Detergent, drying, maintenance and fixed utility charges are excluded unless you add them to another cost line.
Can I compare different scenarios?
Yes. Change one assumption at a time, keep units and definitions consistent, and save the inputs used for each comparison.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.