1. What is a Watt to Ampere Calculator?

Definition: This calculator converts electrical power in watts to current in amperes using the voltage.

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

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

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

3. Importance of Current Calculation

Details: Proper current calculation ensures safe circuit design, proper wire sizing, and prevents electrical overloads.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What voltage should I use?
A: Use 120V for standard US outlets, 240V for large appliances, or check your device specifications.

Q2: Does this work for DC and AC circuits?
A: Yes, for DC and resistive AC loads. For reactive AC loads, power factor must be considered.

Q3: Why is my result showing many decimal places?
A: The calculator shows precise results (3 decimal places) for accurate circuit design.

Q4: How do I find the wattage of a device?
A: Check the device label or specifications, or use a wattmeter to measure actual power consumption.

Q5: What if I know amps but need watts?
A: Rearrange the formula: \( P = V \times I \). We can add a reverse calculator if needed.