1. What is an Electrical Power Calculator?

Definition: This calculator computes electrical power in watts from voltage and current values using Ohm's Law.

Purpose: It helps electricians, engineers, and hobbyists determine the 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 calculate the power in watts.

3. Importance of Power Calculation

Details: Proper power calculation ensures correct circuit design, appropriate component selection, and safety in electrical systems.

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 AC and DC power calculations?
A: This calculator works for DC circuits. For AC, you'd need to consider power factor (cos φ).

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

Q3: How do I measure current safely?
A: Use a multimeter in series with the circuit, following proper safety procedures.

Q4: Can I calculate current if I know power and voltage?
A: Yes, using I = P/V. We may add this functionality in a future version.

Q5: What about three-phase power calculations?
A: Three-phase power requires additional factors. Consider our Three-Phase Power Calculator for those needs.