Calculators
Four calculators built on published data — manufacturer wattage charts, the ENERGY STAR sizing tables, and EIA state electricity rates. Each has a methodology page listing every source and formula, and an embeddable badge.
CalculatorGenerator Wattage CalculatorRunning watts, the largest starting surge, and a generator class from manufacturer charts.CalculatorAir Conditioner BTU CalculatorThe ENERGY STAR sizing table with its sun, people, and kitchen adjustments.CalculatorDehumidifier Sizing CalculatorPints per day under the 2019 rating, mapped to the sizes stores sell.CalculatorAppliance Electricity Cost CalculatorCost per day, month, and year at your state’s average rate (EIA).