1. What is a Voltage Watts Amps Calculator?

Definition: This calculator estimates the voltage based on power in watts and current in amps using Ohm's Law.

Purpose: It helps electrical professionals and DIYers determine voltage when power and current are known.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Voltage (volts)
• \( P \) — Power (watts)
• \( I \) — Current (amps)

Explanation: The power is divided by current to calculate the voltage in the circuit.

3. Importance of Voltage Calculation

Details: Proper voltage calculation ensures safe circuit design, proper equipment operation, and electrical system efficiency.

4. Using the Calculator

Tips: Enter the power in watts and current in amps. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between voltage, current and power?
A: According to Ohm's Law, power (P) equals voltage (V) multiplied by current (I), so voltage is power divided by current.

Q2: What units should I use for accurate results?
A: Use watts for power and amps for current to get voltage in volts.

Q3: Can this be used for AC and DC circuits?
A: Yes, for DC circuits and AC circuits with purely resistive loads. For reactive loads, power factor must be considered.

Q4: What if I know voltage and want to find current or power?
A: Use our other calculators: Current Calculator (I = P/V) or Power Calculator (P = V×I).

Q5: Why is my calculated voltage different from measured voltage?
A: Real-world factors like resistance, power factor, and efficiency can cause differences between calculated and actual values.