1,000
1
A
1,000
1,000
1
A
1,000
The Electric Current Converter converts between all standard units of electric current, from picoamperes to megaamperes. Electric current, measured in amperes (A), is one of the seven SI base units and represents the flow of electric charge through a conductor.
The ampere is defined as the flow of one coulomb of charge per second. Since 2019, it is defined by fixing the elementary charge e = 1.602176634 x 10⁻¹⁹ coulombs. This redefinition ties the ampere directly to a fundamental constant of nature, replacing the older definition based on the force between parallel conductors.
Current ranges span an enormous scale in electronics and electrical engineering: picoamperes (pA) in semiconductor leakage currents, nanoamperes (nA) in sensor circuits, microamperes (µA) in battery standby drain, milliamperes (mA) in LED circuits, amperes (A) in household appliances, kiloamperes (kA) in industrial power systems, and megaamperes (MA) in lightning bolts and plasma physics.
Understanding current unit conversion is essential for circuit design, power system analysis, safety assessment, and sensor specification. A current as small as 10 mA through the human body can cause muscular contraction, while 100 mA can be lethal. Household circuits are typically protected by 15–20 A breakers.
This converter handles 7 decades of current measurement using standard SI metric prefixes. All conversions are exact powers of 10, making the mathematics straightforward but the tool valuable for quick, error-free conversion in engineering calculations.
The converter normalizes all values to amperes (A) as the base unit, then converts to the target unit. All conversions use exact SI prefix multipliers: pico = 10⁻¹², nano = 10⁻⁹, micro = 10⁻⁶, milli = 10⁻³, kilo = 10³, mega = 10⁶.
Safety reference: 1 mA is the threshold of perception for most people, 10–20 mA causes involuntary muscle contraction ("let-go" threshold), 100–200 mA can cause ventricular fibrillation, and 1–10 A causes cardiac arrest and severe burns.
Inputs
Results
2.5 A = 2500 mA
Inputs
Results
500 µA = 0.0005 A
The ampere (A) is the SI base unit of electric current. It is defined by fixing the elementary charge at exactly 1.602176634 x 10^-19 coulombs, which means 1 A = 1 coulomb per second.
Divide milliamperes by 1000. For example, 500 mA = 0.5 A. The prefix 'milli' means one-thousandth.
US household circuits are typically 15 or 20 amperes. Large appliances (dryers, ovens) may use 30-50 A circuits. Total service is usually 100-200 A.
Standard LEDs typically draw 10-20 mA. High-power LEDs may draw 350 mA to 1 A or more.
As little as 100-200 mA (0.1-0.2 A) through the heart can cause ventricular fibrillation and death. The perception threshold is about 1 mA.
DC (direct current) flows in one direction. AC (alternating current) reverses direction periodically (50 or 60 times per second). The ampere unit applies to both.
Ammeters, multimeters, and clamp meters measure current. Clamp meters are particularly convenient as they can measure current without breaking the circuit.
Kiloamperes (kA) are used for short-circuit currents in power systems, industrial welding, and aluminum smelting. Short-circuit currents can reach 10-200 kA.
Ohm's law: I = V/R, where I is current in amperes, V is voltage in volts, and R is resistance in ohms. Current equals voltage divided by resistance.
Nanoamperes measure very small currents in semiconductor devices, biomedical sensors, ion chambers, and electrometer circuits where leakage currents must be characterized.
Roboculator Team
The Roboculator Team explains calculations, planning tools, and practical formulas in clear language for real-life situations.
How helpful was this calculator?
Be the first to rate!
Electric Potential Converter
Electricity & Magnetism Converters
Electric Resistance Converter
Electricity & Magnetism Converters
Electric Conductance Converter
Electricity & Magnetism Converters
Capacitance Converter
Electricity & Magnetism Converters
Inductance Converter
Electricity & Magnetism Converters
Magnetic Flux Converter
Electricity & Magnetism Converters
