1. What is a Watt Calculator?

Definition: This calculator computes electrical power (in watts) based on voltage and current using Ohm's Law.

Purpose: It helps electricians, engineers, and DIY enthusiasts determine the power consumption or generation of electrical devices.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Power in watts (W)
• \( V \) — Voltage in volts (V)
• \( I \) — Current in amperes (A)

Explanation: The product of voltage and current gives the electrical power in watts.

3. Importance of Wattage Calculation

Details: Proper wattage calculation ensures correct sizing of electrical components, prevents circuit overloads, and helps estimate energy consumption.

4. Using the Calculator

Tips: Enter the voltage in volts and current in amperes. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Can I calculate current if I know power and voltage?
A: Yes, using \( I = \frac{P}{V} \). We may add this functionality in future versions.

Q2: What's the difference between watts and volt-amps?
A: Watts represent real power, while volt-amps represent apparent power. They're equal in DC circuits or AC circuits with unity power factor.

Q3: How does this relate to energy consumption?
A: Energy (kWh) = Power (kW) × Time (hours). Multiply watts by hours of use and divide by 1000 for kWh.

Q4: Can I use this for three-phase calculations?
A: This calculates single-phase power. For three-phase, multiply by √3 (about 1.732) for balanced loads.

Q5: What's a typical household current?
A: Common household circuits are 15-20A at 120V (US) or 10A at 230V (Europe).