1. What is Electrical Power?

Electrical power is the rate at which electrical energy is transferred by an electric circuit. It represents the amount of work done by electricity per unit time and is measured in watts (W).

2. How Does the Calculator Work?

The calculator uses the fundamental power formula:

Where:

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

Explanation: This formula calculates the electrical power consumption by multiplying the voltage across a circuit by the current flowing through it.

3. Importance of Power Calculation

Details: Calculating power draw is essential for electrical system design, energy consumption analysis, circuit protection sizing, and determining operating costs of electrical devices.

4. Using the Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers. The calculator will compute the power consumption in watts.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between AC and DC power calculation?
A: For DC circuits, P = V × I directly. For AC circuits with resistive loads, it's the same, but with reactive loads, power factor must be considered.

Q2: How do I convert watts to kilowatts?
A: Divide the watt value by 1000. For example, 1500 watts = 1.5 kilowatts.

Q3: Why is power calculation important for electrical safety?
A: It helps determine if circuits are overloaded, ensures proper wire and breaker sizing, and prevents electrical fires.

Q4: Can I use this for three-phase power calculation?
A: For balanced three-phase systems, use P = √3 × V × I × PF, where PF is power factor.

Q5: How does power relate to energy consumption?
A: Energy = Power × Time. For example, a 100W device running for 10 hours consumes 1 kWh of energy.