1. What is kW from Amps Calculator?

Definition: This calculator converts electrical current (amps) to power (kilowatts) for single-phase AC circuits.

Purpose: It helps electricians and engineers determine power consumption based on current measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Power in kilowatts
• \( V \) — Voltage in volts
• \( I \) — Current in amperes
• \( PF \) — Power factor (0 to 1)

Explanation: The product of voltage and current gives apparent power, which is then multiplied by the power factor to get real power, and divided by 1000 to convert watts to kilowatts.

3. Importance of Power Calculation

Details: Accurate power calculation ensures proper circuit sizing, energy efficiency analysis, and electrical system design.

4. Using the Calculator

Tips: Enter the voltage (typically 120V or 240V for residential), current (measured value), and power factor (default 0.8). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor is the ratio of real power to apparent power, representing efficiency (typically 0.8-0.95 for most equipment).

Q2: Can I use this for three-phase systems?
A: No, this is for single-phase only. Three-phase requires a different formula with √3 factor.

Q3: Why divide by 1000?
A: To convert watts (V×A) to kilowatts (1 kW = 1000 W).

Q4: What's a typical power factor?
A: Motors: 0.8-0.9, Incandescent lights: 1.0, Fluorescent lights: 0.5-0.9.

Q5: How do I measure current?
A: Use a clamp meter around one conductor in single-phase systems.