1. What is the Watts to Amps Conversion?

The conversion from watts to amps is based on Ohm's Law and the power formula, allowing you to calculate electrical current when you know the power (in watts) and voltage (in volts).

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 15W in this calculator
• \( V \) — Voltage in volts (V)

Explanation: This formula shows the direct relationship between power, voltage, and current in an electrical circuit.

3. Importance of Current Calculation

Details: Calculating current is essential for circuit design, selecting proper wire sizes, choosing circuit breakers, and ensuring electrical safety.

4. Using the Calculator

Tips: Enter the voltage of your circuit to calculate how many amps 15 watts will draw at that voltage. Common voltages include 120V (US household), 230V (EU household), or 12V (automotive).

5. Frequently Asked Questions (FAQ)

Q1: Why is the power fixed at 15 watts?
A: This calculator is specialized for converting 15 watts to amps, which might be useful for specific appliances or devices rated at 15W.

Q2: What's the current for 15W at 120V?
A: Approximately 0.125A (15 ÷ 120 = 0.125).

Q3: Does this work for DC and AC circuits?
A: For purely resistive loads, yes. For reactive loads (AC with inductors/capacitors), power factor must be considered.

Q4: How does current change with voltage?
A: Current is inversely proportional to voltage for constant power. Higher voltage means lower current for the same power.

Q5: What's the relationship between watts, volts and amps?
A: Watts = Volts × Amps. This calculator solves for Amps when Watts and Volts are known.