🔌 Electric / Voltage Converter
Choose two known values to calculate the other two.
Calculated Results:
Calculated Unit:
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Calculation complete! Thank you for using our Electric Unit Converter.
💡 How to Work
This calculator uses Ohm's Law and the Power Law to find any two missing electrical units (V, A, W, Ω) when the other two are known.
- Enter the numerical value for the **first known electrical unit** into the top input box.
- Select the corresponding unit type (**Volts, Amps, Watts, or Ohms**) from the adjacent dropdown.
- Repeat this process for the **second known electrical unit**.
- Click the **"Calculate"** button to solve the circuit.
- The results for the two unknown units will be displayed in the **Calculated Unit** area. Click **"Reset"** to clear the inputs.
❓ Frequently Asked Questions (FAQs)
What is the relationship between Voltage, Current, and Resistance?
The relationship is defined by **Ohm's Law**: Voltage (V) equals Current (I) multiplied by Resistance (R), or $V = I \times R$. This is fundamental to understanding electrical circuits.
What are the standard units for power, voltage, and current?
The standard unit for electrical **Power** is the **Watt (W)**. For **Voltage**, it is the **Volt (V)**. For electrical **Current**, it is the **Ampere (A)**, often shortened to Amp.
What is the formula for calculating electrical power (Watts)?
Electrical power (P) is calculated by multiplying Voltage (V) by Current (I). The formula is: $P = V \times I$.
Why are there different voltages (like 120V vs 240V) used globally?
Different voltages exist due to historical infrastructure development. For instance, the **120V system** (used primarily in North America) is generally considered safer, while the **240V system** (used in Europe and much of Asia) is more efficient for transmitting power over long distances with less current.
What does a Voltage Converter (Transformer) do?
A voltage converter, or transformer, changes the electrical potential (voltage) from one level to another. This is necessary when traveling internationally, for example, to step down 240V power to safely run a 120V device.