1. What is a Voltage to Wattage Calculator?

Definition: This calculator determines electrical power (wattage) from voltage and current values using Ohm's Law.

Purpose: It helps electricians, engineers, and DIY enthusiasts calculate power consumption or generation in electrical circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The voltage is multiplied by the current to determine the power in watts.

3. Importance of Power Calculation

Details: Proper power calculation ensures correct sizing of electrical components, circuit protection, and energy efficiency.

4. Using the Calculator

Tips: Enter the voltage in volts and current in amps. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula valid for both AC and DC?
A: For DC and purely resistive AC circuits, yes. For reactive AC circuits, power factor must be considered.

Q2: What's a typical household voltage?
A: In North America, 120V for most outlets and 240V for large appliances. Europe uses 230V standard.

Q3: How does this relate to energy consumption?
A: Energy (kWh) = Power (kW) × Time (hours). This calculator gives instantaneous power.

Q4: Can I calculate current if I know power and voltage?
A: Yes, use I = P/V. We have a separate calculator for this conversion.

Q5: What's the difference between real power and apparent power?
A: Real power (watts) does actual work. Apparent power (VA) includes reactive components in AC circuits.