1. What is a Watts to Amps 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 in volts 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 in volts (default 120V for standard US household current). 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 (electron flow rate).

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

Q3: Can I calculate three-phase current with this?
A: No, this is for DC or single-phase AC. Three-phase requires a different formula including power factor.

Q4: Why is my result showing many decimal places?
A: Current calculations often result in precise values. The calculator shows 3 decimal places for accuracy.

Q5: How does this relate to circuit breakers?
A: Circuit breakers are rated in amps. Knowing current draw helps select appropriate breaker sizes.