#Watts to unit calculator portable
Examples include LED light bulbs, heaters, pumps, motors, and portable fans.
The electricity cost calculator on this page is ideal for appliances with a reasonably constant power draw. They monitor your entire household's energy usage from one device! Tips When Calculating Appliance Running Costs Our range of Wireless Energy Monitors takes things a step further. It calculates instantaneous power usage (Watts), energy usage (kWh over time), cost, and much more. The Reduction Revolution Power Meter is one of our most popular products.
As the saying goes: garbage in, garbage out - so please be careful when entering your data!įor this reason, we sell several devices to help you calculate the cost of running your appliances with much greater ease and accuracy. But it also has low accuracy (as it is based solely on estimates), and it cannot log actual energy usage over time. The above electricity usage calculator is quick, free, and easy to use. Here's how it works:Įlectricity Usage Per Year = (Watts / 1000) * Hours/Day * Days/Week * Weeks/Year = kWh/yearĮlectricity Cost Per Year = kWh/year * (cents/kWh / 100) = $/year Two Other Ways To Calculate Your Electricity Costs Our power calculator uses a simple formula to calculate annual energy usage and costs. A loss that goes down to just 1 or 2W when you switch to an LED MR16 light bulb. *A 50W halogen light bulb loses an extra 15W in the transformer. These examples assume an electricity tariff of 25 cents per kWh. Enter them in our calculator above, change the inputs, and see the impact. Here are some example calculations for everyday appliances. Sample task: convert 2 Watts of power maintained over an hour to Joules.Note: our affordable power meters do some of these calculations for you. For example, if your input is in KiloWatt, you need to divide by 1,000 in order to get the result in Joules. Then you need to follow the definition the Watt as 1 Joule per second and perform the mathematical transformation required to convert the time units to seconds and the power unit to Watts. Therefore, in our Joules to Watts converter you have two inputs: one for power (mW, W, KW, MW) and one for time (sec, min, hours). In order to convert Watts - a unit of power, to Joules - a unit of energy, we need to know a third variable - the time period of interest. More energy will be used in a given time-frame with a higher level of power, therefore, for a set energy level, a longer period results in higher energy consumption under the same power, while a higher level of power would spend the available energy in less time. The equivalent energy unit for Joules is Watt hours. Energy is the work performed over a period of time while Power is the rate of delivery of energy, meaning work performed per unit of time. Watts are units of power while Joules are units of energy and there is often confusion about the difference between the terms power and energy. Our Watts to Joules converter also supports conversion from MilliWatts (mW), Watts (W), KiloWatts (KW), and MegaWatts (MW) to KiloJoules (kJ) and MegaJoules (mJ) per second, per minute or per hour. Where E is the energy in Joules, P is the power in Watts, and t is the time in seconds. The formula for calculating Energy in Joules (J) is: In the International System of Units (SI) it is defined as a derived unit of 1 Joule per second with a symbol W.
This comes from the definition of the Watt, which is a unit of power used to quantify the rate of energy transfer. Exactly 1 Watt equal one Joule per second.
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