1. What is a kW to Amps Calculator?

Definition: This calculator converts electrical power in kilowatts (kW) to current in amperes (A) for single-phase AC circuits.

Purpose: It helps electricians, engineers, and DIY enthusiasts determine the current draw of electrical equipment.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I \) — Current in amperes (A)
• \( P_{kW} \) — Power in kilowatts (kW)
• \( V \) — Voltage in volts (V)
• \( PF \) — Power factor (unitless, between 0 and 1)

Explanation: The power in kW is converted to watts (×1000), then divided by the product of voltage and power factor.

3. Importance of Current Calculation

Details: Proper current calculation ensures correct wire sizing, circuit breaker selection, and prevents electrical hazards.

4. Using the Calculator

Tips: Enter the power in kW, system voltage (default 120V), and power factor (default 0.8). All values must be > 0, with PF between 0.01 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor represents the ratio of real power to apparent power, typically between 0 and 1. For resistive loads it's 1, for motors about 0.8.

Q2: What voltage should I use?
A: Common single-phase voltages are 120V (North America) or 230V (Europe). Check your local standards.

Q3: Does this work for three-phase systems?
A: No, this is for single-phase only. Three-phase requires a different formula with √3 factor.

Q4: Why multiply kW by 1000?
A: To convert kilowatts to watts (1 kW = 1000 W) since the basic power formula uses watts.

Q5: What if I don't know the power factor?
A: For resistive loads (heaters, incandescent lights) use 1. For motors, 0.8 is a safe estimate.