1. What is a Voltage Calculator?

Definition: This calculator estimates the voltage in an electrical circuit based on power and current values.

Purpose: It helps electricians, engineers, and students determine voltage when power and current are known.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Voltage (volts)
• \( P \) — Power (watts)
• \( I \) — Current (amps)

Explanation: The power is divided by current to calculate the voltage in the circuit.

3. Importance of Voltage Calculation

Details: Proper voltage calculation ensures electrical system safety, proper equipment operation, and circuit design accuracy.

4. Using the Calculator

Tips: Enter the power in watts and current in amps. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use?
A: Power should be in watts, current in amps, and the result will be in volts.

Q2: Does this work for AC and DC circuits?
A: This formula works for DC circuits. For AC circuits, power factor must be considered.

Q3: What if I know voltage and want to find current?
A: Rearrange the formula: \( I = \frac{P}{V} \)

Q4: What's a typical household voltage?
A: In most countries, standard household voltage is 110-120V or 220-240V.

Q5: Can I use this for three-phase systems?
A: For three-phase systems, you'll need to include the power factor (√3 for balanced loads).