Voltage Converter
Free Voltage Converter for electrical & magnetic units. Enter a value to see equivalent measurements across systems. Enter your values for instant results.
Reviewed by Manoj Kumar, Mathematics Educator
Formula
Converted Value = Input x (From Unit Factor / To Unit Factor)
Voltage conversion uses the volt (V) as the base SI unit. Metric prefixes scale by powers of 10 (mV = 10^-3 V, kV = 10^3 V, etc.). CGS units convert through fixed physical constants: the abvolt equals 10^-8 V and the statvolt equals approximately 299.79 V. Watt per ampere is dimensionally identical to volts.
Worked Examples
Example 1: Power Supply Voltage Conversion
Problem:A sensor outputs 3300 millivolts. Express this in volts, microvolts, and kilovolts.
Solution:3300 mV to V: 3300 x 0.001 = 3.3 V\n3300 mV to uV: 3300 x 1000 = 3,300,000 uV\n3300 mV to kV: 3300 x 0.000001 = 0.0033 kV\nThis is a common logic-level voltage for microcontrollers.
Result:3300 mV = 3.3 V = 3,300,000 uV = 0.0033 kV
Example 2: Transmission Line Voltage
Problem:A high-voltage transmission line operates at 345 kV. Convert to volts and megavolts.
Solution:345 kV to V: 345 x 1000 = 345,000 V\n345 kV to MV: 345 / 1000 = 0.345 MV\nThis is a standard extra-high-voltage (EHV) transmission level in North America.
Result:345 kV = 345,000 V = 0.345 MV
Frequently Asked Questions
What are typical voltage levels in electrical systems?
Common voltage levels vary widely by application. AA batteries produce 1.5 V, USB ports supply 5 V, car batteries provide 12 V, and US household outlets deliver 120 V RMS (170 V peak). European households use 230 V. Industrial equipment often runs on 480 V three-phase power. Power distribution lines carry 4-35 kV, and high-voltage transmission lines operate at 115-765 kV. Lightning strikes can reach hundreds of millions of volts momentarily.
How does voltage relate to current and power?
Voltage, current, and power are related by fundamental electrical laws. Ohm Law states V = I x R (voltage equals current times resistance). The power equation states P = V x I (power equals voltage times current). Combining these gives P = V^2/R and P = I^2 x R. These relationships are essential for electrical engineering, circuit design, and power system calculations. Higher voltage allows the same power to be transmitted with less current, reducing losses in transmission lines.
References
Reviewed by Manoj Kumar, Mathematics Educator · Editorial policy