Watt-U-Use home energy calculator shows you the costs of running a variety of household appliances, so you can budget for your next utility bills. Calculates by any two of wattage, voltage, amperage. Shows a comparison between the least and most expensive appliance. Calculates cost per hour and cost per day for each appliance. Calculates an estimate for the next utility bill. Shows your estimated energy bill for the month, quarter and year. Lets you add any appliance (lights, stereo, washingmachine etc). Allows for any discounts or rebates on energy bills. Calculates kilowatt hourly charge rates. Fully customizable.