1. What is an Amperage Calculator?

Definition: This calculator determines the electrical current (amperage) based on power consumption (watts) and voltage (volts).

Purpose: It helps electricians, engineers, and DIY enthusiasts calculate current draw for electrical circuits and 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 determine the current flow in amperes.

3. Importance of Current Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between AC and DC in this calculation?
A: For resistive loads, the calculation is the same. For reactive loads (AC), power factor must be considered.

Q2: What's a typical household voltage?
A: In the US: 120V for standard outlets, 240V for large appliances. In Europe: typically 230V.

Q3: How do I find the power (watts) of a device?
A: Check the device label or specifications. For simple devices: Power = Voltage × Current.

Q4: Why is this calculation important for circuit breakers?
A: Circuit breakers are rated in amps. This calculation helps ensure your load doesn't exceed breaker capacity.

Q5: Can I use this for three-phase calculations?
A: No, three-phase requires an additional factor (√3) and power factor consideration.