How many milliamps is dangerous?

Current as low as 10 mA can cause painful muscle contractions. 100–200 mA passing through the chest can cause ventricular fibrillation and be fatal. The exact danger depends on current path, duration, and frequency.

What is the difference between AC and DC current?

Direct current (DC) flows in one direction — batteries and solar panels produce DC. Alternating current (AC) reverses direction periodically — mains power is AC at 50 or 60 Hz. The ampere unit applies to both; for AC it refers to the RMS (root mean square) value.

The abampere (abA) is the CGS-electromagnetic unit of current, equal to exactly 10 amperes. It appears in older physics and engineering texts but has been replaced by the SI ampere in modern use.

What is a statampere?

The statampere is the CGS-Gaussian unit of current, equal to approximately 3.336 × 10⁻¹⁰ A. It is extremely small and only encountered in classical electromagnetic theory.

How does current relate to voltage and resistance?

Ohm's Law: I = V / R. Current in amperes equals voltage in volts divided by resistance in ohms. Doubling the voltage doubles the current; doubling the resistance halves it.

Conversions

↵ to calculate

Current Converter - Ampere Milliampere Converter Online

Convert between amperes, milliamperes, microamperes, kiloamperes, abamperes, statamperes, and more instantly.

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How to use this calculator

👉 Fill in the boxes below and your answer appears instantly — no maths needed, we do it all for you! 🎉

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In plain English — what does this do?

📏 Some countries say ‘30 degrees’ and others say ‘86 degrees’ for the same weather! Some say ‘5 km’, others say ‘3 miles’. This tool swaps between them instantly so you always know what it means.

📌 Direct Answer & Summary

A current converter lets you switch between units of electric current — the flow of electric charge. The SI unit is the ampere (A). Milliamperes and microamperes are used in electronics and sensor circuits; kiloamperes and megaamperes in industrial and lightning scenarios. The abampere and statampere are CGS units used in classical electromagnetism.

Value

From

What is Current Converter - Ampere Milliampere Converter Online?

How to use it

1️⃣ Enter the current value in the Value field.
2️⃣ Select the unit you are converting from in the From dropdown.
3️⃣ Select the unit you want to convert to in the To dropdown.
4️⃣ The result and a full table of all equivalent currents appear instantly.
5️⃣ Click the swap button to reverse the conversion.

Formula

converted = input_value * (factor_of_from_unit / factor_of_to_unit), where all factors are expressed relative to amperes (A)

💡 See it in action — a real example

A typical USB device draws about 500 mA = 0.5 A. A lightning bolt can carry up to 30,000 A = 30 kA. To convert 500 mA to µA: 500 × 1000 = 500,000 µA.

❓ Common questions

How many milliamps is dangerous?: Current as low as 10 mA can cause painful muscle contractions. 100–200 mA passing through the chest can cause ventricular fibrillation and be fatal. The exact danger depends on current path, duration, and frequency.
What is the difference between AC and DC current?: Direct current (DC) flows in one direction — batteries and solar panels produce DC. Alternating current (AC) reverses direction periodically — mains power is AC at 50 or 60 Hz. The ampere unit applies to both; for AC it refers to the RMS (root mean square) value.
What is an abampere?: The abampere (abA) is the CGS-electromagnetic unit of current, equal to exactly 10 amperes. It appears in older physics and engineering texts but has been replaced by the SI ampere in modern use.
What is a statampere?: The statampere is the CGS-Gaussian unit of current, equal to approximately 3.336 × 10⁻¹⁰ A. It is extremely small and only encountered in classical electromagnetic theory.
How does current relate to voltage and resistance?: Ohm's Law: I = V / R. Current in amperes equals voltage in volts divided by resistance in ohms. Doubling the voltage doubles the current; doubling the resistance halves it.

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