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Power consumption calculator: calculates electric power / voltage / current / resistance. Enter 2 values to get the other values and press the Calculate button: Voltage (V) calculation from current (I) and resistance (R): V(V) = I(A) × R(Ω) Complex power (S) calculation from voltage (V) and current (I):
Use this calculator to determine Watts (W), Volts (V), Amps (A), and Ohms (Ω). It's designed for DC power, voltage, current, and resistance calculations. Just input any two values, and the tool will compute the others. Click 'Calculate' to get results. Enter 2 values to get the other values and press the Calculate button:
To calculate the Watt-hours (Wh) of a battery, follow these steps: Find the battery's voltage (V) and amp-hours (Ah) from its specifications. For example, a 12V50 battery has 12 V voltage and 50 amp-hours capacity. Multiply the battery's voltage by its amp-hours to get the battery's capacity in Watt-hours: capacity (in Wh) = voltage × amp-hours
Use our wattage calculator to calculate the power in watts given voltage, current, or resistance. Plus, see the formulas to calculate wattage.
For a single-phase service like this one, Watt’s Laws tells us that amps equals watts divided by the product of volts and power factor. Because the power factor for both appliances is 1, we can effectively ignore power factor in this particular equation.
The phase current I in amps (A) is equal to the power P in watts (W), divided by the power factor PF times the RMS voltage V in volts (V): I (A) = P (W) PF × V (V)
Our Ohm's law calculator is a neat little tool to help you find the relationships between voltage, current and resistance across a given conductor. The Ohm's law formula and voltage formula are mainly used in electrical engineering and electronics.
