How do I convert ampere to milliampere?

To convert ampere to milliampere, use our free online converter. Simply enter your ampere value and get instant, accurate results. The conversion is based on internationally standardized factors.

Can I convert milliampere back to ampere?

Absolutely! You can use the swap button in the converter to reverse the conversion direction, or visit our milliampere to ampere converter page for the reverse calculation.

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Ampere Converter

Convert Ampere to Milliampere and more â€¢ 12 conversions

Enter Value

From

Decimals:

Scientific:OFF

Result

1 = 0

Conversion Formula

1 = ...

1â†’1

10â†’10

100â†’100

1000â†’1000

Quick:

Convert Ampere to Milliampere (A to mA)

Convert Amperes (A) to Milliamperes (mA). In the world of modern electronics, full Amps are often too large a unit. Most sensors, microcontrollers (like Arduino), and smartphones sip power in the milliamp range. Converting down to mA helps you accurately size batteries and estimate runtimes.

Conversion Formula

mA = A × 1000

Multiply Amperes by 1000. For example, 0.5 A × 1000 = 500 mA.

Ampere (A)

Definition

The Ampere is the SI base unit of electric current, measuring the flow of electric charge.

Origins & History

Named after André-Marie Ampère, a French mathematician and physicist considered the father of electrodynamics. Defined by the force between two parallel wires, and recently redefined by the elementary charge constant.

Current Use: Used for household mains electricity (circuit breakers are often 15A or 20A) and heavy appliances.

OUT

Milliampere (mA)

Definition

One thousandth of an Ampere.

Origins & History

As electronics shrunk from vacuum tubes to transistors and ICs, currents dropped significantly, making the milliampere the standard working unit for engineers.

Current Use: Standard for battery capacities (mAh), LED current ratings (often 20mA), and USB power specs.

All Current Conversions

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📐Conversion Formula

= × 1.00000

How to Convert

To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.

Quick Examples

1.000

10.00

100

100.0

💡 Pro Tip: For the reverse conversion ( → ), divide by the conversion factor instead of multiplying.

Related Current Conversions

Explore more current conversions for your calculations.

→Abampere to Ampere →Ampere to Abampere →Ampere to Abampere →Ampere to Cgs E M Unit →Ampere to Cgs E S Unit →Ampere to Emu of Current →Ampere to Esu of Current →Ampere to Kiloampere →Ampere to Statampere →Ampere to Milliamps →Abampere to Ampere →Cgs E M Unit to Ampere

View all 18 current conversions →

Frequently Asked Questions

How do I convert to ?▼

To convert to , multiply your value by 1. For example, 10 equals 10 .

What is the formula for to conversion?▼

The formula is: = × 1. This conversion factor is based on international standards.

Is this to converter accurate?▼

Yes! MetricConv uses internationally standardized conversion factors from organizations like NIST and ISO. Our calculations support up to 15 decimal places of precision, making it suitable for scientific, engineering, and everyday calculations.

Can I convert back to ?▼

Absolutely! You can use the swap button (⇄) in the converter above to reverse the conversion direction, or visit our to converter.

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