1. What is a Watts Calculator by Voltage and Amps?

Definition: This calculator computes electrical power in watts based on voltage and current (amps) using Ohm's Law.

Purpose: It helps electricians, engineers, and DIY enthusiasts determine the power consumption or generation of electrical devices.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The voltage is multiplied by the current to determine the electrical power in watts.

3. Importance of Watts Calculation

Details: Proper power calculation ensures correct circuit design, proper sizing of electrical components, and energy efficiency.

4. Using the Calculator

Tips: Enter the voltage in volts and current in amps. Both values must be > 0 for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between watts, volts, and amps?
A: Volts measure electrical pressure, amps measure current flow, and watts measure the resulting power.

Q2: Can I calculate amps if I know watts and voltage?
A: Yes, use the formula \( A = \frac{W}{V} \).

Q3: What's a typical voltage for household circuits?
A: In North America, 120V for standard outlets and 240V for large appliances.

Q4: How many watts can a standard 15A circuit handle?
A: At 120V, about 1800W (120V × 15A = 1800W).

Q5: Does this work for both AC and DC circuits?
A: For DC and resistive AC loads, yes. For reactive AC loads, power factor must be considered.