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Electric Current Converter

Converter

Show all unit conversions

Enter a current value to see the conversion result.

About This Tool

Electric Current Converter – Convert Between pA, mA, A, kA and More

The Electric Current Converter is a free online tool that instantly converts electric current values between eight units — from picoamperes to kiloamperes, including the CGS electromagnetic and electrostatic legacy units. Whether you are an electronics engineer verifying a microcontroller sleep current in microamperes, a student converting milliamperes to amperes for circuit calculations, or a researcher working with picoampere-scale semiconductor leakage, this tool delivers accurate results in real time with configurable decimal precision.

All conversions normalize through the Ampere (A) as the canonical SI base unit. The conversion formula is:

result = inputValue × (fromUnitFactor / toUnitFactor)

Because most supported units are exact powers of ten relative to the Ampere, conversions are mathematically precise within IEEE 754 double-precision limits. For the CGS Statampere unit, the accepted NIST value of 3.335641 × 10⁻¹⁰ A is used. Very large or very small results automatically switch to scientific notation.

Supported Electric Current Units

The converter spans the full practical range from sub-semiconductor signals to industrial and natural phenomena:

  • Picoampere (pA) — 10⁻¹² A — The scale of gate leakage in modern CMOS transistors, reverse-bias diode leakage at room temperature, and dark current in high-sensitivity photodiodes. Precision electrometers routinely measure currents in the picoampere range.
  • Nanoampere (nA) — 10⁻⁹ A — Common in reverse-biased p-n junctions, low-power microcontroller sleep modes (deep sleep), electrochemical biosensors, and quiescent currents of CMOS operational amplifiers.
  • Microampere (µA) — 10⁻⁶ A — Typical operating current for ultra-low-power sensors, RFID tags, and Bluetooth Low Energy devices in advertising mode. Many battery-powered IoT devices target sub-milliampere active currents in the microampere range.
  • Milliampere (mA) — 10⁻³ A — The standard working range for LEDs (typically 20 mA), signal transistors, and most portable battery-powered electronics. Component datasheets frequently specify current ratings in mA.
  • Ampere (A) — base unit — The SI unit of electric current, defined since 2019 by fixing the elementary charge e = 1.602176634 × 10⁻¹⁹ C. Household appliances typically draw currents of 1–15 A from the mains supply.
  • Kiloampere (kA) — 10³ A — Used in industrial applications such as electric arc furnaces, high-power welding equipment, bus bars in power distribution panels, and aluminium smelting rectifiers. The peak current in a lightning return stroke is around 20–30 kA.
  • Abampere (abA) — 10 A — The CGS electromagnetic unit of current; exactly 10 Amperes. A legacy unit from the centimetre-gram-second EMU system, still referenced in older electrical engineering and magnetics literature.
  • Statampere (statA) — ≈ 3.336 × 10⁻¹⁰ A — The CGS electrostatic unit of current, derived from the statcoulomb per second. Used in the Gaussian unit system for electrostatics calculations. One statampere is approximately 333.6 picoamperes.

Conversion Examples

The following examples illustrate common conversions across the supported range:

  • 1500 mA → A: 1500 × 0.001 = 1.5 A (typical smartphone fast-charge current)
  • 0.02 A → mA: 0.02 / 0.001 = 20 mA (standard LED forward current)
  • 250 µA → mA: 250 × 10⁻⁶ / 10⁻³ = 0.25 mA
  • 1 A → statA: 1 / 3.335641×10⁻¹⁰ = ≈ 2.998 × 10⁹ statA
  • 20 kA → A: 20 × 1000 = 20,000 A (lightning bolt peak current)

Electric Current in Electrical Engineering

Electric current is the rate of flow of electric charge through a conductor, defined as I = Q / t, where I is current in amperes, Q is charge in coulombs, and t is time in seconds. It is one of the seven SI base quantities and forms the foundation of circuit analysis.

In DC circuits, Ohm's law relates current, voltage, and resistance: I = V / R. The power dissipated in a resistive load is P = I × V = I² × R, which is why even small increases in current can cause significant increases in heat dissipation — a critical consideration in PCB trace sizing, fuse selection, and power supply design.

In AC circuits, current and voltage may be out of phase, and the effective (RMS) current determines the actual power delivered to a load. Understanding current magnitudes across scales — from nanoampere leakage paths to kiloampere fault currents — is essential for safe and reliable electrical design.

Key Features

  • Instant conversion — results update automatically as you type, with no submit button required.
  • Swap units — reverse the From/To direction in one click to immediately see the opposite conversion.
  • Show all units — toggle on a complete reference table showing the input value in every supported unit simultaneously.
  • Real-world context — for recognised current levels (LED current, USB charging, circuit breakers, lightning) the tool displays a brief contextual note explaining the application.
  • Adjustable precision — set decimal places from 0 to 10; the tool automatically uses scientific notation for extreme values.
  • Negative values supported — reversed-direction currents convert correctly across all units.

Frequently Asked Questions

Is the Electric Current Converter free?

Yes, Electric Current Converter is totally free :)

Can I use the Electric Current Converter offline?

Yes, you can install the webapp as PWA.

Is it safe to use Electric Current Converter?

Yes, any data related to Electric Current Converter only stored in your browser (if storage required). You can simply clear browser cache to clear all the stored data. We do not store any data on server.

What current units does this converter support?

The Electric Current Converter supports eight units: Picoampere (pA), Nanoampere (nA), Microampere (µA), Milliampere (mA), Ampere (A), Kiloampere (kA), Abampere (abA, CGS-EMU), and Statampere (statA, CGS-ESU). These cover the practical range from semiconductor leakage currents in the picoampere range through industrial and lightning-scale kiloamperes, plus two legacy CGS units still referenced in older literature.

How does the electric current converter work?

All conversions normalize through the Ampere as the base unit. The input value is multiplied by the source unit's factor to obtain amperes, then divided by the target unit's factor to yield the result. For example, 1500 mA to A: 1500 × 0.001 / 1 = 1.5 A. This two-step approach works for any combination of the eight supported units, including the non-decimal CGS units.

Can I enter negative current values?

Yes. Negative current values are physically valid in circuit analysis, representing a current flowing in the opposite direction to the chosen reference. The converter accepts and correctly converts negative inputs across all supported units.

What is the 'Show All Units' table?

When enabled, the Show All Units table displays the input value converted into every supported current unit simultaneously. This is useful when you need a full reference breakdown at a glance — for example, confirming that 1 A equals 1000 mA, 1,000,000 µA, 0.001 kA, and approximately 3.336 × 10⁹ statamperes.

What are the Abampere and Statampere units?

The Abampere (abA) is the CGS electromagnetic unit of current, equal to exactly 10 A. The Statampere (statA) is the CGS electrostatic unit, equal to approximately 3.336 × 10⁻¹⁰ A. Both are legacy units from pre-SI systems that still appear in older physics and engineering texts, particularly in electrostatics and magnetostatics literature.

How accurate are the conversions, and when does scientific notation appear?

Conversions between SI-prefixed units (pA through kA) are exact powers of ten, so results are precise within the limits of IEEE 754 double-precision floating point. The CGS unit factors (Statampere: 3.335641 × 10⁻¹⁰ A) use accepted NIST values. Scientific notation is used automatically for values below 0.0001 or above 1 × 10¹², keeping extreme results readable. You can also adjust the displayed decimal precision from 0 to 10 places.