1. What is the Watts to Amps Conversion?

The conversion from watts to amperes is based on Ohm's Law and calculates the electric current (I) when you know the power (P) and voltage (V). For a fixed power of 1500 watts, the current varies inversely with voltage.

2. How Does the Calculator Work?

The calculator uses the electrical power formula:

Where:

• \( I \) — Current in amperes (A)
• \( P \) — Power in watts (W), fixed at 1500W
• \( V \) — Voltage in volts (V)

Explanation: The current drawn by a 1500-watt device depends entirely on the voltage supplied. Higher voltage means lower current for the same power.

3. Importance of Current Calculation

Details: Knowing the current draw is essential for circuit design, selecting proper wire gauge, choosing circuit breakers, and ensuring electrical safety.

4. Using the Calculator

Tips: Enter the voltage in volts (common values are 120V for US, 230V for Europe). The voltage must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What current does a 1500W heater draw at 120V?
A: \( I = 1500 / 120 = 12.5 \) A

Q2: What about at 240V?
A: \( I = 1500 / 240 = 6.25 \) A

Q3: Why does higher voltage mean lower current?
A: Power equals voltage times current (P=VI). For constant power, increasing voltage decreases current proportionally.

Q4: Can I use this for DC and AC circuits?
A: Yes, for purely resistive loads. For reactive loads (motors, transformers), power factor must be considered.

Q5: What wire size do I need for 1500W?
A: Depends on current and local codes. At 120V (12.5A), typically 14 AWG (US) or 1.5mm² (EU) is sufficient for short runs.