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Is Electrical Charge Converter safe? Does it store my data?

Electrical Charge Converter processes your data locally in your browser. Nothing is sent to or stored on our servers.

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Open the tool, enter or paste your input, and your result appears instantly. Use the copy button to save it. The whole process takes under a minute.

Electrical Charge Converter

Convert electrical charge between coulombs, ampere-hours, faradays, and other charge units.

Convert Units

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Select a unit to convert to it.

Convert electrical charge measurements between different units including coulombs, ampere-hours, faradays, and more with our professional electrical charge converter.

What is Electrical Charge Converter?

Electrical charge is a physical property of matter that causes it to experience a force in an electromagnetic field.

Understanding the Units

Coulomb (C)

SI unit of electric charge.

Common Uses: Physics, electrical engineering

Ampere-hour (Ah)

Charge transferred by 1 ampere in 1 hour.

Common Uses: Battery capacity

Conversion: 1 Ah = 3,600 C

Milliampere-hour (mAh)

One-thousandth of an ampere-hour.

Common Uses: Small battery capacity

Conversion: 1 mAh = 3.6 C

Common Electrical Charge Conversions

Example	Electrical Charge
Smartphone battery	4,000 mAh = 4 Ah = 14,400 C
Car battery (lead-acid)	50 Ah = 180,000 C
AA alkaline battery	2,500 mAh = 2.5 Ah = 9,000 C
Laptop battery	50,000 mAh = 50 Ah = 180,000 C (typical)

Conversion Formulas

Charge = Current × Time (Q = I × t)
Coulombs to Ampere-hours: Ah = C ÷ 3,600
Ampere-hours to Coulombs: C = Ah × 3,600
mAh to Coulombs: C = mAh × 3.6
mAh to Ah: Ah = mAh ÷ 1,000

Practical Examples

Charging a 4,000 mAh phone at 2 A: takes ~2 hours

EV battery (60 kWh at 400 V): ~540,000 C of charge

Lightning bolt: approximately 5 coulombs of charge in 0.2 seconds

Human defibrillator shock: ~360 joules at ~5,000 V = ~0.07 C

When to Use Each Unit

Coulombs (C): Physics and electrical engineering calculations

Ampere-hours (Ah): Large battery capacity — car batteries, power banks, EVs

Milliampere-hours (mAh): Small battery capacity — phones, earbuds, wearables

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