1. What is a Power Voltage Current Calculator?

Definition: This calculator solves for any one missing variable in the electrical power equation P = V × I.

Purpose: It helps electricians, engineers, and hobbyists calculate power, voltage, or current when two of the three values are known.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

Explanation: Enter any two known values to calculate the third unknown value. The calculator automatically determines which variable to solve for.

3. Importance of Power Calculations

Details: Proper power calculations ensure electrical systems are properly sized, circuits aren't overloaded, and components are appropriately rated.

4. Using the Calculator

Tips: Enter any two known values (leave the field you want to calculate empty). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between AC and DC in these calculations?
A: For simple calculations, the formula works for both. For AC systems with reactive power, additional factors like power factor must be considered.

Q2: How do I calculate current from power and voltage?
A: Current (I) = Power (P) ÷ Voltage (V). Just enter P and V, leaving I blank.

Q3: What's a typical household voltage?
A: In North America, 120V for standard outlets and 240V for large appliances. Europe typically uses 230V.

Q4: Can I calculate power in kilowatts?
A: Yes, just remember 1 kilowatt = 1000 watts. The calculator gives results in watts.

Q5: How accurate are these calculations?
A: The calculations are mathematically precise. Real-world accuracy depends on the precision of your input measurements.