Energy Costs
What it really costs to run air conditioners, heat pumps, heaters and dehumidifiers, with your own utility rates.
Calculators
Average Electricity Usage by Appliance: kWh Estimator and Usage TableAppliance energy is watts × hours ÷ 1,000 = kWh, and kWh × your rate gives the cost. A typical US home uses somewhere ar…Cost to Run an Air Conditioner: Hourly, Daily and Monthly CalculatorRunning cost = BTU/h × hours ÷ (SEER2 × 1,000) × your electricity rate. A 2-ton (24,000 BTU/h), 14.3 SEER2 central AC th…Cost to Run an Electric Heater: Space Heater and Baseboard CalculatorEvery electric resistance heater turns each watt into 3.412 BTU/h of heat, so its cost depends only on wattage, hours an…Dehumidifier Running Cost Calculator: Watts, Pint Size and Monthly BillMost portable dehumidifiers draw about 300–700 W while the compressor runs, so a mid-size unit running 12 hours a day co…Heat Pump Running Cost Calculator: Heating, Cooling and Annual CostHeat pump electricity = heat delivered (BTU) ÷ (COP × 3,412). At an average COP of 2.8, delivering 30,000 BTU/h for 10 h…