1. What is an Electrical Power Calculator?

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

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 electrical power in watts.

3. Importance of Power Calculation

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

4. Using the Calculator

Tips: Enter the voltage in volts and current in amps. All values must be > 0.

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 need to consider power factor (cos φ).

Q2: How do I measure voltage and current?
A: Use a multimeter - connect in parallel for voltage, in series for current.

Q3: What if I know power and want to find current?
A: Rearrange the formula: \( I = \frac{P}{V} \)

Q4: What's a typical household voltage?
A: 120V in North America, 230V in most other countries.

Q5: How does this relate to energy consumption?
A: Energy (kWh) = Power (kW) × Time (hours). This calculator gives instantaneous power.