Power To Voltage Calculator


In the realm of electrical engineering and physics, the conversion between power and voltage is a fundamental aspect. Whether you’re designing circuits or analyzing power systems, a power to voltage calculator can be a handy tool. This article introduces a simple yet effective calculator to perform this conversion effortlessly.

How to Use:

Using the power to voltage calculator is straightforward. Simply input the known power value in watts, and the calculator will provide the corresponding voltage output. The formula used for this conversion is V = sqrt(P * R), where V represents voltage in volts, P denotes power in watts, and R stands for resistance in ohms.


The formula utilized in this calculator is derived from Ohm’s law, which states that voltage (V) equals the product of current (I) and resistance (R), i.e., V = I * R. In the case of power (P) in watts, which is the product of voltage and current (P = V * I), we can rearrange the formula to solve for voltage, resulting in V = sqrt(P * R).

Example Solve:

Let’s consider an example where we have a power of 100 watts and a resistance of 50 ohms. Using the formula V = sqrt(P * R), we can calculate the voltage:

V = sqrt(100 * 50)

V = sqrt(5000)

V ≈ 70.71 volts

Therefore, the voltage output corresponding to a power of 100 watts and a resistance of 50 ohms is approximately 70.71 volts.


Q: What units should be used for input values?

A: Input values should be in watts for power and ohms for resistance.

Q: Can this calculator be used for AC circuits as well?

A: Yes, this calculator can be used for both AC and DC circuits, provided the power and resistance values are known.

Q: Is there any limitation to the values that can be input?

A: There are no specific limitations, but it’s essential to ensure that the input values are within the practical range of electrical engineering applications.


The power to voltage calculator presented here offers a convenient solution for converting power to voltage in electrical systems. By leveraging the fundamental principles of Ohm’s law, users can quickly obtain accurate voltage values based on known power and resistance parameters.

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