1. What is the Watts Calculator?

Definition: This calculator determines electrical power in watts using the fundamental formula P = V × I.

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

Explanation: Power is calculated by multiplying the voltage across a component by the current flowing through it.

3. Importance of Power Calculation

Details: Understanding power consumption is crucial for circuit design, energy efficiency, and selecting appropriate components.

4. Using the Calculator

Tips: Enter the voltage in volts and current in amps. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between watts, volts, and amps?
A: Volts measure electrical potential, amps measure current flow, and watts measure the rate of energy transfer (power).

Q2: Can I use this for AC circuits?
A: For DC circuits or AC circuits with purely resistive loads, yes. For reactive AC loads, power factor must be considered.

Q3: How many watts are in 1 amp at 120 volts?
A: 120 watts (120V × 1A = 120W).

Q4: What's a typical household current?
A: Most household circuits are 15-20 amps at 120 volts (US), providing 1800-2400 watts per circuit.

Q5: How do I convert watts to kilowatts?
A: Divide watts by 1000 (1 kW = 1000 W).