Voltage Calculator
Calculate voltage, current, resistance, and power in electrical circuits with our comprehensive tool
Calculation Results
Enter your parameters to see detailed circuit analysis.
Detailed Analysis
Your detailed circuit analysis will appear here.
⚡ Common Voltage Standards
| Application | Voltage | Current | Region |
|---|---|---|---|
| Household (Standard) | 120V / 230V | 15-20A | US / Europe |
| USB Power | 5V | 0.5-3A | Worldwide |
| Automotive | 12V | 10-100A | Worldwide |
| Industrial | 480V | 50-1000A | Worldwide |
| High Voltage Transmission | 110-765kV | 100-2000A | Worldwide |
| Battery (AA/AAA) | 1.5V | 0.1-2A | Worldwide |
| Lithium-ion Battery | 3.7V | 1-10A | Worldwide |
Note: Voltages may vary by country and specific application.
⚠️ Electrical Safety Tips
Circuit Protection
Always use appropriate circuit breakers or fuses to protect against overloads and short circuits.
Personal Protection
Wear insulated gloves and use insulated tools when working with live circuits.
Voltage Testing
Always test for voltage before working on circuits - assume all circuits are live until verified.
Dry Conditions
Never work with electricity in wet conditions or with wet hands.
Inspect Equipment
Regularly inspect cords and equipment for damage that could expose live wires.
High Voltage
Leave high voltage work to qualified professionals - household current can be lethal.
Note: This calculator provides theoretical calculations based on Ohm's Law. Actual circuit behavior may vary due to factors like temperature, material properties, and circuit design. Always consult a qualified electrician for real-world applications.