1. What is a Watts Calculator?

Definition: This calculator determines electrical power in watts based on voltage and current.

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:

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

Explanation: This is the fundamental power formula in DC circuits and the real power component in AC circuits.

3. Importance of Power Calculation

Details: Accurate power calculation ensures proper circuit design, component sizing, and energy efficiency.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Does this work for AC circuits?
A: For AC circuits with purely resistive loads, yes. For reactive loads, you'll need to consider power factor.

Q2: What's a typical household voltage?
A: In North America, 120V is standard, while many other countries use 230V.

Q3: How do I measure current?
A: Use a multimeter set to measure amperes in series with the circuit.

Q4: Can I calculate current if I know watts and voltage?
A: Yes, use I = W/V. We may add this functionality in a future update.

Q5: What about three-phase power?
A: Three-phase power requires a different calculation (W = √3 × V × I × PF).