A planet completely covered with snow or ice would have an albedo close to 100%, while a completely dark planet would have an albedo close to zero. Scientists use the term albedo to describe how much light a planet or surface reflects away. Since Earth is not completely black, some of this energy is reflected away and not absorbed by our planet. Plugging in values and solving for E, we find that our planet intercepts about 174 petawatts of sunlight. K S = solar insolation ("solar constant") = 1,361 watts per square meter.E = total energy intercepted (technically, energy flux = energy per unit time, in watts).If we multiply this area by the amount of energy per unit area - the solar "insolation" mentioned above, we can determine the total amount of energy intercepted by Earth: In this case, the circle's radius is simply the radius of Earth, which is about 6,371 km (3,959 miles) on average.
#Power formula physics calculator how to
How to calculate power within exact values.įor your convenience, I would explain some power calculator formula to measure the total energy.The area of a circle is pi times the radius of the circle squared. You must be alright with working hours, but the question is still there. Most devices come with calibrated watts, and you can take a rough estimation by dividing the working hours by three. If you precisely know the hours, you can estimate the electric consumption. Well, its simple to calculate the working hour for an appliance. How to calculate electric consumption and cost? That’s why the power formula calculator is used to estimate your home electric detail. It would be difficult to obtain all essential electric detail with an accurate value. Thus, you can determine the electric power by the power formula. You can see power is equal to the difference of voltage and the total amount of current passing through the tool. Well, it’s hard to understand, but I would explain it simply for your better assessment.Įlectric power = voltage difference x current What is power, and how can you calculate it?Įlectric power is the specified rate at which energy travels through an electric circuit. Hence, I would recommend buying a power calculator to get accurate and comprehensive detail. The power calculator formula can help you do this job with ease if you have sufficient information about electric appliances. You may need to know about some electric detail that could define your power total power consumption. However, calculating power is not that simple. Now, you can check the power by attaching the electric power calculator to your tool. But it’s not easy in some cases thus, a power calculator is introduced in the market to detail your electric unit. You can calculate simply by knowing about the voltages and current of that tool. Some people are so responsible and want to know the monthly or yearly consumption of the electric appliances used at home. You can save your money and buy an accurate product that could be suitable according to your place voltages. Thus, a power rating calculator would be an ideal choice for you to determine the total house load. You need an advance option that could help you for a longer time.
Sometimes an electric tool may have high wattages that could be not compatible with your home voltage.
You think this information is enough to calculate energy values. If you buy an electric appliance, volts and watts would be calibrated along with resistance sometimes. The question arises in mind why a power calculator is essential to calculate energy consumption. Q c (kVAR) = Q (kVAR) – Q corrected (kVAR)Ĭ (F) = 1000 × Q c (kVAR) / (2π f (Hz)× V (V) 2) How to get a three-phase power calculation? Q corrected (kVAR) = √ ( S corrected (kVA) 2 – P (kW) 2) S corrected (kVA) = P (kW) / PF corrected Power factor correction capacitor’s capacitance calculation:
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