Current Converter

Convert between Ampere, Milliampere, Microampere and more

Free online electric current unit converter supporting 4 units: Ampere (A), Milliampere (mA), Microampere (µA), Kiloampere (kA). Real-time conversion with high precision. No registration required.

How to Use

Simple 3-step process to convert current units:

Step 1: Enter Value
Enter the current value in any unit field (Ampere, Milliampere, Microampere, or Kiloampere)
Step 2: Automatic Conversion
All other unit fields will be automatically converted in real-time
Step 3: Copy Results
Copy the converted values you need for your calculations

All conversions are performed in your browser. No data is sent to our servers.

Current Converter Tool

Ampere (A)

Milliampere (mA)

Microampere (µA)

Kiloampere (kA)

Practical Use Cases

Electric current converters are essential in various fields:

1. Electronics Design

Convert current ratings for electronic components. A typical LED draws 20 mA = 0.02 A = 20,000 µA. Understanding these conversions is crucial for circuit design and component selection.

2. Battery Capacity Analysis

Calculate battery discharge rates. A 2000 mAh battery can provide 2000 mA for 1 hour, or 2 A for 1 hour. Convert between units to understand power consumption and battery life.

3. Electrical Safety

Understand dangerous current levels. 1 mA can be barely felt, 10 mA causes muscle contractions, 100 mA (0.1 A) can be lethal. Converting between units helps understand electrical safety specifications.

4. Power Distribution

Industrial power systems often use kiloamperes (kA) for high-current applications. 1 kA = 1000 A. Converting between units is essential for electrical engineering and power grid management.

5. Sensor Calibration

Many sensors output current signals in the 4-20 mA range. Converting to microamperes (4000-20000 µA) or amperes (0.004-0.02 A) helps with signal processing and calibration.

What is Electric Current Conversion?

Electric current is the flow of electric charge. Different applications use different units to measure current, making conversion essential.

Common Current Units

Ampere (A) is the SI base unit of electric current. 1 Ampere = 1 Coulomb of charge per second. Milliampere (mA) is one-thousandth of an ampere (1 mA = 0.001 A), commonly used in electronics. Microampere (µA) is one-millionth of an ampere (1 µA = 0.000001 A), used for very small currents in sensors. Kiloampere (kA) is one thousand amperes (1 kA = 1000 A), used in high-power applications.

Why Convert Current Units?

Different industries and applications use different current units. Electronics typically use milliamperes and microamperes for low-power circuits. Power engineering uses amperes and kiloamperes for high-power systems. Converting between these units ensures accurate measurements, proper component selection, and electrical safety compliance.

Conversion Accuracy

This converter uses exact conversion factors: 1 A = 1000 mA = 1,000,000 µA = 0.001 kA. All conversions are mathematically exact with no approximations. Results are provided with up to 10 decimal places for scientific and engineering precision.

Frequently Asked Questions

What is the difference between Ampere and Milliampere?

Ampere (A) is the SI base unit of electric current. Milliampere (mA) is one-thousandth of an ampere: 1 A = 1000 mA. Electronics typically use milliamperes for component ratings (e.g., LED current: 20 mA), while larger systems use amperes (e.g., household circuit: 15 A).

How do I convert mA to A?

Divide milliamperes by 1000 to get amperes. For example: 500 mA = 500 ÷ 1000 = 0.5 A. Conversely, multiply amperes by 1000 to get milliamperes: 2 A = 2 × 1000 = 2000 mA.

What current level is dangerous?

Current above 10 mA (0.01 A) can cause muscle contractions. 30 mA (0.03 A) can cause breathing difficulty. 100 mA (0.1 A) can be lethal if passing through the heart. Even small currents in milliamperes can be dangerous depending on the path through the body.

Why do electronics use milliamperes instead of amperes?

Most electronic components draw small currents (typically 1-100 mA). Using milliamperes avoids decimal notation and makes values easier to read: 20 mA is clearer than 0.020 A. It also matches component datasheets which are standardized in mA.

What is a microampere used for?

Microamperes (µA) measure very small currents in low-power devices: sleep mode current (1-10 µA), sensor leakage current (< 1 µA), precision analog circuits (1-100 µA). 1 µA = 0.001 mA = 0.000001 A. Modern IoT devices aim for microampere-level consumption to extend battery life.

How accurate is this current converter?

This converter uses exact mathematical conversions with up to 10 decimal places precision. Conversion factors are exact: 1 A = 1000 mA (exact), 1 mA = 1000 µA (exact), 1 kA = 1000 A (exact). No approximations are used.

What is Kiloampere used for?

Kiloampere (kA) is used for very high currents in industrial applications: electric arc furnaces (50-200 kA), aluminum smelting (100-400 kA), power grid fault currents (20-100 kA), lightning strikes (20-200 kA). 1 kA = 1000 A.

How do I measure current in my circuit?

Use an ammeter or multimeter set to current mode. Connect it in series with the circuit (break the circuit and insert the meter). Start with a higher range (A) and switch to lower ranges (mA, µA) for more precision. Never connect an ammeter in parallel - this can damage the meter or circuit.