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)
• \( A \) — Current in amperes (A)

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

3. Importance of Power Calculation

Details: Accurate power calculation is essential for circuit design, energy efficiency, and electrical safety.

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 and volt-amps?
A: Watts represent real power, while volt-amps represent apparent power. They're equal in DC circuits or AC circuits with purely resistive loads.

Q2: Can I calculate watts from ohms and amps?
A: Yes, using the formula W = A² × Ω (power equals current squared times resistance).

Q3: What's a typical household circuit wattage?
A: Standard 15-amp, 120-volt circuits can handle up to 1,800 watts (80% of 15×120 for safety).

Q4: How does this relate to kilowatt-hours?
A: Kilowatt-hours = (watts × hours used) ÷ 1,000. This measures energy consumption over time.

Q5: Why is power calculation important?
A: It helps determine appropriate wire sizes, circuit breaker ratings, and energy costs.