What is the base SI unit for electric charge?

The primary reference unit for electric charge in this converter is the Coulomb (C). All 8 supported electric charge units are anchored to this standard.

Are these electric charge conversion factors verified?

Yes, all electric charge conversion constants on UnitConvertersGo are verified against NIST Special Publication 811 and ISO/IEC 80000 international metrology standards.

Electric Charge Converter

Enter a value below to convert between metric, imperial, and standard electric charge units.

Convert Electric Charge

Enter a value and select the units to convert between milliampere-hours, ampere-hours, and coulombs.

Instant conversion

Value

From

Result

0.00001 C

10 µC = 0.00001 C

0.00000277 mAh = 2.777778e-9 Ah = 0.00001 CGet Widget

You can change the units using the dropdowns above or click on a unit button.

Suggested Conversions

Common Electric Charge Reference Points

Here are some common electric charge values in Milliampere-hour (mAh), Ampere-hour (Ah), and Coulomb (C). Click any preset value or arrow to load it into the converter.

Description	Milliampere-hour (mAh)	Ampere-hour (Ah)	Coulomb (C)
Smartwatch battery (300 mAh)	300	0.3	1,080
1 Ampere-hour (1,000 mAh)	1,000	1	3,600
Typical smartphone battery (4,500 mAh)	4,500	4.5	16,200
USB power bank (10,000 mAh)	10,000	10	36,000
Automotive 12V starter battery (60,000 mAh / 60 Ah)	60,000	60	216,000

Electric Charge Conversion Formulas

Use the following formulas to convert between milliampere-hours, ampere-hours, and coulombs.

mAh to Ah

Ah = mAh ÷ 1,000

Ah to mAh

mAh = Ah × 1,000

Ah to Coulombs

C = Ah × 3,600

Example: Convert 5,000 mAh Battery Capacity to Ampere-hours (Ah)

Ah = 5,000 ÷ 1,000

Ah = 5 Ah (18,000 Coulombs)

1 Ampere-hour (Ah) equals 1,000 milliampere-hours (mAh) or 3,600 Coulombs (C).

More Microcoulomb & Coulomb Conversions

Convert from Microcoulombs

Convert to Coulombs

Frequently Asked Questions

1 microcoulomb (µC) equals 0.000001 coulombs (C). Multiply your microcoulomb value by 0.000001 or enter it in the Electric Charge Converter above for instant calculation.

Electric Charge Converter

Quick Info

Coulomb (C) is the coherent SI unit of electric charge transported by 1 Ampere in 1 second.
Milliampere-hour (mAh) is the standard rating for smartphone, laptop, and consumer lithium-ion batteries.
Ampere-hour (Ah) equals 1,000 mAh (3,600 C), used for automotive, solar, and marine batteries.
Charge vs. Energy: Multiply Ah by battery Voltage (V) to convert charge capacity into Watt-hours (Wh).

Electric Charge Units Comparison

Milliampere-hour (mAh)

Equal to 0.001 Ah or 3.6 Coulombs.

Ampere-hour (Ah)

Equal to 1,000 mAh or 3,600 Coulombs.

Coulomb (C)

Coherent SI unit of electric charge (1 A·s).

References

[1]NIST CUU · Derived SI Unit: Coulomb (C)
Source
[2]NIST OWM · SI Units — Electric Current
Source
[3]NIST SP 811 · NIST SP 811 App. B.9 (1 Ah = 3,600 C)
Source

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All Electric Charge Conversion Calculators (8)

Select any dedicated electric charge pair below for worked examples and printable tables

Microcoulombs to Coulombs (µC to C)Nanocoulombs to Coulombs (nC to C)mAh to Ah (Milliampere-hours to Ampere-hours)Ah to mAh (Ampere-hours to Milliampere-hours)mAh to Coulombs (Milliampere-hours to C)Amp-Hours to Kilowatt-Hours (Ah to kWh) Conversion Calculator Amp-Hours to Watt-Hours (Ah to Wh) Conversion Calculator Milliamp-Hours to Watt-Hours (mAh to Wh) Conversion Calculator

Category Conversion Matrix

Simultaneous comparison of 8 units in this category

Coulomb (C)

Kilocoulomb (kC)

0.001

Millicoulomb (mC)

1,000

Microcoulomb (µC)

1,000,000

Nanocoulomb (nC)

1,000,000,000

Picocoulomb (pC)

1.000000e+12

Ampere-hour (Ah)

0.00027777

Milliampere-hour (mAh)

0.27778

Electric Charge Unit Definitions & Symbols

Coulomb (C)

SI unit of electric charge (1 A·s).

Kilocoulomb (kC)

METRIC

Equal to 1,000 Coulombs.

Millicoulomb (mC)

METRIC

One-thousandth of a Coulomb.

Microcoulomb (µC)

METRIC

One-millionth of a Coulomb (10⁻⁶ C).

Nanocoulomb (nC)

METRIC

One-billionth of a Coulomb (10⁻⁹ C).

Picocoulomb (pC)

METRIC

One-trillionth of a Coulomb (10⁻¹² C).

Ampere-hour (Ah)

OTHER

Battery charge capacity unit equal to 3,600 Coulombs (1,000 mAh).

Milliampere-hour (mAh)

OTHER

Battery capacity unit equal to 0.001 Ah or 3.6 Coulombs.

References

NIST · BIPM · ISO

[1]
NIST CUU (Derived SI Unit: Coulomb (C))·Electric Charge Metrology Standards — Coulomb (C), Kilocoulomb (kC) & Millicoulomb (mC)
NIST CUU Standard
[2]
NIST OWM (SI Units — Electric Current)·International Reference Specification for Electric Charge & Battery Capacity
NIST OWM Reference
[3]
NIST SP 811 (NIST SP 811 App. B.9 (1 Ah = 3,600 C))·Official Electric Charge Conversion Factors & Rounding Rules
NIST SP 811 Tables

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Electric Charge

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