cost of running a dishwasher load
Calculating the cost-per-load of laundry (top-loader). 1  For water, we'll figure 40 gallons for a standard top-loading U.S. washer, and the national average of $5.44 per thousand gallons, which gives us $0.22 per load for water. For electricity to power the washer, we'll figure 0.256 kWh times a sample cost of 15 /kWh, which gives us $0.04 for electricity.