1. What is Current Draw from Watts?

Definition: This calculator determines the electrical current (in amps) drawn by a device based on its power consumption (in watts) and operating voltage.

Purpose: Helps electricians, engineers, and homeowners calculate current requirements for circuit sizing and electrical safety.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

• \( I \) — Current (amps)
• \( P \) — Power (watts)
• \( V \) — Voltage (volts)

Explanation: The power in watts is divided by the voltage to determine the current draw in amperes.

3. Importance of Current Calculation

Details: Proper current calculation ensures safe circuit design, prevents overloads, and helps select appropriate wire gauges and circuit breakers.

4. Using the Calculator

Tips: Enter the power consumption in watts and operating voltage (default 120V for US household). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between watts and amps?
A: Watts measure power (energy per unit time), while amps measure current (charge flow rate). Watts = Volts × Amps.

Q2: What voltage should I use?
A: Common voltages: 120V (US household), 230V (European household), 12V (automotive), or check your device specifications.

Q3: Does this work for DC and AC circuits?
A: Yes, for pure resistive loads. For AC with reactive components, power factor must be considered.

Q4: How do I find a device's wattage?
A: Check the label, specifications, or use a wattmeter. Some devices list amps instead - use Watts = Volts × Amps.

Q5: Why is my circuit breaker tripping?
A: If the calculated current exceeds your circuit's rating (typically 15-20 amps for household circuits), it may trip the breaker.