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Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit as shown below. By knowing any two values of the Voltage, Current or Resistance quantities we can use Ohms Law to find the third missing value.
We’ve seen the formula for determining the power in an electric circuit: by multiplying the voltage in “volts” by the current in “amps” we arrive at an answer in “watts.” Let’s apply this to a circuit example:
With our watt calculator, you'll have a better understanding of what is Watt's law and the electrical power unit. Would you like to learn how to find watts? What about what connects volts, amps, watts, and ohms? Well, to do that, we need to dive in and discover what the power equation is!
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.
To calculate electric power, consider a voltage difference existing across a material (Figure 9.6.2). The electric potential V1 is higher than the electric potential at V2, and the voltage difference is negative V = V2 − V1.
Use the wattage calculator below to calculate the power in watts given the voltage, current, or resistance. Wattage is a measure of electrical power in watts.
Electric power is the rate at which electrical energy is transferred. The formula is Power = Current × Voltage: Power (P) is measured in Watts (W), Current (I) is measured in Amps (A), and Voltage (V) is measured in Volts (V). It takes both Current and Voltage to create Power!
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):
Define electric power and describe the electric power equation; Calculate electric power in circuits of resistors in series, parallel, and complex arrangements
Use this Ohm's Law calculator to easily calculate the power, resistance, voltage, or electrical current, based on two known parameters. Enter any two parameters to calculate the other two. Supports amps, milliamps, watts, kilowatts, megawatts, volts, millivolts and kilovolts, ohms, kiloohms, and megaohms.