1. What is a Watt to Voltage Calculator?

Definition: This calculator determines the voltage based on power in watts and current in amps using Ohm's Law.

Purpose: It helps electrical engineers, technicians, and hobbyists calculate 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 (in watts) is divided by the current (in amps) to calculate the voltage.

3. Importance of Voltage Calculation

Details: Proper voltage calculation is essential for circuit design, electrical safety, and ensuring components operate within their specified ratings.

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 if I know voltage and want to find power?
A: Use \( P = V \times I \). Multiply voltage by current to get power in watts.

Q2: Is this calculation valid for both AC and DC?
A: For DC circuits, yes. For AC, this gives RMS voltage when using RMS current and real power.

Q3: What's a typical current for household appliances?
A: Most household devices draw 1-15 amps at 120V (US) or 230V (Europe).

Q4: How does this relate to Ohm's Law?
A: This is a variation of Ohm's Law when power is known instead of resistance.

Q5: Can I use this for three-phase systems?
A: For three-phase, use \( V = \frac{P}{\sqrt{3} \times I \times pf} \) where pf is power factor.