1. What is the Watts to Amps Formula?

The formula I = P/V calculates electrical current (amperes) from power (watts) and voltage (volts). This is a fundamental equation in electrical engineering and physics, derived from Ohm's Law.

2. How Does the Calculator Work?

The calculator uses the electrical current formula:

Where:

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

Explanation: The current flowing through a circuit is equal to the power divided by the voltage. This applies to DC circuits and AC circuits with purely resistive loads.

3. Importance of Current Calculation

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

4. Using the Calculator

Tips: Enter power in watts and voltage in volts. Both values must be positive numbers. For AC circuits with reactive components, power factor must be considered.

5. Frequently Asked Questions (FAQ)

Q1: Does this formula work for AC circuits?
A: For AC circuits with purely resistive loads, yes. For reactive loads (inductive or capacitive), you need to consider power factor.

Q2: What's the difference between amps and watts?
A: Amps measure current flow, while watts measure power (rate of energy consumption). Watts = Volts × Amps.

Q3: How many amps is 1000 watts?
A: At 120 volts, about 8.33 amps (1000W ÷ 120V). At 240 volts, about 4.17 amps.

Q4: Why is current calculation important?
A: It helps prevent circuit overloads, ensures proper component sizing, and maintains electrical safety.

Q5: Can I calculate watts if I know amps and volts?
A: Yes, using P = V × I. This calculator can be rearranged to solve for any of the three variables.