These are approximate values only. Appliance Watts/Amps Calculator Electricity is measured in units of energy called watts, named after James Watt, the inventor of the steam engine. Select Appliance Size Power in watts Hrs / day Total kWh Select AC, Window – 10k BTU AC, Window – 12k BTU AC, Window – 6.5k BTU Cell phone charger Clothes Dryer – Gas Clothes Dryer – Electric Coffee Maker Computer w/17 in. Knowing how much energy each device in your home uses can help you better manage your energy use and save money on your bills. (the number of hours you use it per day) x (the number of days uses) x ([wattage of the electrical appliance in watt] / 1,000) = kWh(energy consumed by appliance) If you want to calculate the monthly power consumption by your electrical device then the number of days use=30. Watts is generally defined as the amount of power (or energy) an appliance uses (consumes) when operated at its maximum capacity for 1 hour . The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A): The power P in watts (W) is equal to the squared voltage V in volts (V) divided by the resistance R in ohms (Ω): The power P in watts (W) is equal to the squared current I in amps (A) times the resistance R in ohms (Ω): Ohm's law calculator Many appliances have a range of settings, so the actual amount of power an appliance … 1/2 HP Furnace Fan 3. Very seldom are all tools or appliances operating simultaneously. Wattage Calculator . The wattage values provided are samples only; actual wattage of products varies depending on product age and features. Deep Freezer 4. The wattage listed is the maximum power drawn by the appliance. You should check the appliance for actual ratings. Appliance Calculator Appliances and lighting can account for almost 20% of an average family’s annual energy use. Lights (6 x 75 watts… Calculate your Total Running Watts and record your highest Starting Watts. Refrigerator/Freezer 2. In some circumstances, e.g., high-end graphics cards, SLI, or Crossfire, we advise users purchase a higher wattage than the recommendation to avoid potential problems. To calculate power consumption of any appliance, you have to multiply it’s wattage by the number of hours it is being used (operational hours). To find the energy cost of your appliance, select a device from the list below. monitor De-Humidifier Dishwasher - Cool Dry Dishwasher - … Calculate how much power your system needs by entering your setup. Energy Use Calculator offers electricity usage calculators for various devices. HIGHEST ADDITIONAL STARTING WATTS 1550 RUNNING WATTS 2950 TOTAL 4500 STARTING WATTS = + Tool or Appliance Running (Rated) Watts Additional Starting (Surge) Watts 1. There are different categories to consider when choosing a generator for your needs: recreation, home standby and construction. Please note that the Wattage Calculator only provides an indication of the minimum power that your system requires. Enter a wattage value for your own product for the most accurate estimate. Allow 2 times the listed running watts for starting these devices. You may also want to consider using an inverter generator for sensitive electronic devices. Our appliance and electronic energy use calculator allows you to estimate your annual energy use and cost to operate specific products. Allowing you to calculate the electrical cost of your home appliances, and helping you save power consumption costs. Calculate Electricity Usage. The wattage of most appliances is usually stamped on the bottom or back of the appliance, or on its nameplate. For example, a 1000 watt electric iron running for one hour will consume (1000 watt X 1 hour) 1000 watt hour or 1 kilowatt hour (kWh) of electricity. Television — 5. watts and 4500 total starting watts. 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