Current Converter

Convert between amperes, milliamperes, microamperes, and more

From:

ℹ️

To:

ℹ️

Conversion Formula:

Multiply by 1000

Common Conversions

Common Current References

Source/Device	Typical Current	Category
Nerve Signals	100 nA	Biological
Wristwatch	1-10 μA	Electronics
Hearing Aid	0.5-1 mA	Electronics
LED Light	10-30 mA	Electronics
USB Device (USB 2.0)	0.5 A	Consumer
Smartphone Charging	1-3 A	Consumer
Household Circuit	15-20 A	Residential
Electric Vehicle Charging	32-80 A	Automotive
Electric Arc Welding	200-500 A	Industrial
Lightning Strike (peak)	30 kA	Natural
Human-lethal Current	50-100 mA	Safety
GFCI Trip Threshold	5 mA	Safety

Understanding Electric Current

Key Concepts

Electric current is the flow of electric charge
Current is measured in amperes (A)
1 A = 1 coulomb of charge passing per second
Conventional current flows from positive to negative
Electron flow is in the opposite direction
Current flows through conductors (metals, electrolytes)

Ohm's Law & Related Formulas

I = V/R (Current = Voltage / Resistance)
P = I x V (Power = Current x Voltage)
P = I² x R (Power = Current² x Resistance)
For circuits in series: I_total = I_1 = I_2 = ...
For circuits in parallel: I_total = I_1 + I_2 + ...

Current Safety

Current effects on human body:

1 mA: Threshold of perception
5 mA: Mild shock, involuntary muscle reactions
10-20 mA: Painful shock, muscle contractions, can't let go
50 mA: Possible ventricular fibrillation, respiratory arrest
100+ mA: Certain ventricular fibrillation, cardiac arrest
1-5 A: Sustained myocardial contraction, thermal burns

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Visual Comparison

Current Visualization

nAμAmA10mA100mA1A10A100AkA

1.00 A

Medium Current (ampere range)

Severe burns, severe cardiac arrest, certain death

Common Applications:

Household appliances, laptop chargers

Visual Comparison:

LED

20 mA

Smartphone

~1 A

USB-C

3 A

Circuit

15 A

EV Charger

32-80 A

Welding

200+ A

Basic Relationships:

1 Ampere (A) = 1000 Milliamperes (mA)

1 Milliampere (mA) = 1000 Microamperes (μA)

1 Kiloampere (kA) = 1000 Amperes (A)

Note: Current (I) is the flow of electric charge measured in amperes.

Ohm's Law: I = V/R (Current = Voltage/Resistance)

Mobile tip: Swipe left or right on the unit dropdown to quickly change units, or use the arrow buttons

About the Current Converter

Convert between amperes, milliamperes, microamperes, and more All conversions run instantly in your browser and nothing you enter is sent to a server.

Common Conversion Formulas

From	To	Formula
Amperes (A)	Milliamperes (mA)	mA = A × 1,000
Amperes (A)	Microamperes (μA)	μA = A × 1,000,000
Current (I)	Voltage (V), Resistance (R)	I = V / R (Ohm's Law)