Electric Converter - Free Online Tool

Convert electric units instantly. Support for 7+ units including Volt, Kilovolt, Ampere. Free calculator with accurate conversions, formula, and table.

⚡ Electric Converter

Select your units from the lists below

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From Unit

Volt
Symbol: V

Kilovolt
Symbol: kV

Ampere
Symbol: A

Milliampere
Symbol: mA

Ohm
Symbol: Ω

Kilohm
Symbol: kΩ

Watt
Symbol: W

To Unit

Volt
Symbol: V

Kilovolt
Symbol: kV

Ampere
Symbol: A

Milliampere
Symbol: mA

Ohm
Symbol: Ω

Kilohm
Symbol: kΩ

Watt
Symbol: W

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⚡ Electric Converter

Electrical measurements appear in electronics, power systems, and electrical engineering. Convert between volts, amperes, ohms, watts, and other electrical units instantly. Whether you're designing circuits, working with power systems, or troubleshooting electrical equipment, our converter handles the calculations.

⚡ About Electric

Electrical measurement quantifies the fundamental properties of electricity: voltage (electrical potential), current (flow of charge), and resistance (opposition to current). In the International System of Units (SI), these are measured in volts (V), amperes (A), and ohms (Ω) respectively. From electronics and power systems to all electrical engineering applications, these measurements are used everywhere. Ohm's law (V = I × R) relates voltage, current, and resistance, while power is calculated as voltage times current (P = V × I). Working with all these units helps with circuit design, power system analysis, and electrical safety.

Understanding Electric Measurement

Electrical measurement encompasses several fundamental quantities. Voltage (volt, V) measures electrical potential difference, representing the energy per unit charge. Current (ampere, A) measures the rate of flow of electric charge, defined as one coulomb per second. Resistance (ohm, Ω) measures opposition to current flow, defined as the ratio of voltage to current. These units are related by Ohm's law: voltage equals current times resistance (V = I × R). Power (watt, W) in electrical systems equals voltage times current (P = V × I). Since 2019, the ampere is defined by fixing the elementary charge e to exactly 1.602176634×10⁻¹⁹ coulombs, making electrical units traceable to fundamental constants. The volt and ohm are derived units, with practical realizations using quantum effects like the Josephson effect and quantum Hall effect.

📜 History & Context

The history of electrical measurement dates back to the 19th century, when scientists began to understand and quantify electrical phenomena. Alessandro Volta invented the voltaic pile (battery) in 1800, leading to the volt being named in his honor. Georg Ohm formulated Ohm's law in 1827, establishing the relationship between voltage, current, and resistance, though it took years for his work to gain recognition. Early electrical units were inconsistent across different regions. The British Association for the Advancement of Science formed a committee in 1861 to define coherent electrical units. In 1881, the International Electrical Congress formally adopted the volt, ampere, and ohm. Early definitions used physical artifacts: the ohm was defined using a mercury column, while the ampere was defined using silver deposition in electrochemical cells. The modern era of electrical measurement began in 1948, when the ampere was redefined using the force between parallel conductors. In 2019, the SI redefinition established the ampere by fixing the elementary charge, making electrical units traceable to fundamental constants. Today, voltage and resistance standards are realized using quantum effects, providing unprecedented precision and reproducibility.

✨ Fun Facts

• The volt is named after Alessandro Volta, who invented the first battery (voltaic pile) in 1800, though the unit wasn't formally adopted until 1881.
• The ampere is named after André-Marie Ampère, a pioneer of electromagnetism who discovered that electric currents generate magnetic fields.
• The ohm is named after Georg Ohm, who formulated Ohm's law in 1827, though his work wasn't widely appreciated until years later.
• Early ohm standards used a mercury column about 106 centimeters long with a 1 square millimeter cross-section at 0°C, providing a reproducible resistance reference.
• Since 2019, electrical units are defined using fundamental constants—the ampere by fixing the elementary charge, and voltage/resistance using quantum effects like the Josephson effect and quantum Hall effect.

💡 Real-World Examples

• Circuit design: Electronic circuits measure voltage, current, and resistance in various units. Converting between units helps with component selection and circuit analysis.
• Power systems: Electrical grids and power distribution measure voltage in volts or kilovolts, current in amperes. Converting between units helps with system design and international standards.
• Household electrical: Home wiring and appliances operate at specific voltages (120V or 240V) and currents. Converting between units helps with safety compliance and equipment specification.
• Electronics manufacturing: Component specifications and testing measure electrical parameters in various units. Converting between units helps with quality control and international standards.
• Renewable energy: Solar panels and wind turbines generate electricity measured in volts and amperes. Converting between units helps with system integration and power grid compatibility.
• Battery technology: Battery voltage and capacity are measured in volts and ampere-hours. Converting between units helps with device compatibility and performance analysis.
• Electrical safety: Safety standards specify maximum voltages and currents. Converting between units helps with equipment certification and international regulatory compliance.
• Research and development: Electrical experiments and measurements use various units. Converting between units helps with reporting and international scientific collaboration.

🔧 Common Applications

• Electronics and circuit design: Component selection, circuit analysis, and system design measure electrical parameters in various units. Converting between units helps with optimal design and international standards.
• Power systems and electrical engineering: Grid design, power distribution, and electrical equipment specification measure voltage, current, and resistance in different units. Converting between units helps with system integration and international standards.
• Renewable energy systems: Solar, wind, and battery systems measure electrical parameters in various units. Converting between units helps with system design, grid integration, and international standards.
• Electrical safety and compliance: Safety standards, equipment certification, and regulatory compliance measure electrical parameters in different units. Converting between units helps with international standards and safety assurance.
• Research and development: Electrical experiments, measurements, and scientific research use various units. Converting between units helps with reporting, collaboration, and international scientific standards.

❓ Frequently Asked Questions

+ How do I convert volts to millivolts?

To convert volts (V) to millivolts (mV), multiply the volt value by 1,000. For example, 1 volt equals 1,000 millivolts, and 0.5 volts equals 500 millivolts. Millivolts are commonly used for small voltage measurements.

+ What is the difference between volts, amps, and watts?

Volts (V) measure electrical potential difference, amperes (A) measure electrical current flow, and watts (W) measure electrical power. Power equals voltage times current: W = V × A. For example, 120 volts at 5 amps equals 600 watts.

+ How do I convert amperes to milliamperes?

To convert amperes (A) to milliamperes (mA), multiply the ampere value by 1,000. For example, 1 ampere equals 1,000 milliamperes, and 0.5 amperes equals 500 milliamperes. Milliamperes are commonly used for small current measurements.

+ How do I convert ohms to kilohms?

To convert ohms (Ω) to kilohms (kΩ), divide the ohm value by 1,000. For example, 1,000 ohms equals 1 kilohm, and 5,000 ohms equals 5 kilohms. Resistance is measured in ohms, named after Georg Simon Ohm.

+ What is Ohm's Law?

Ohm's Law states that voltage (V) equals current (I) times resistance (R): V = I × R. This fundamental relationship allows you to calculate any one of these values if you know the other two. For example, if current is 2 amps and resistance is 10 ohms, voltage equals 20 volts.