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Coulombs to Milliampere Hours Converter

Convert coulombs to milliampere hours and back instantly with formula and common values.

C

Milliampere Hours

13.3333

mAh

48 C = 13.3333 mAh

mAh = C × 0.277778

Coulombs to Milliampere Hours: 1 C equals 0.277778 mAh. To convert coulombs to milliampere hours, multiply by 0.277778 (mAh = C × 0.277778). For example, 10 C = 2.777778 mAh.

How to Convert Coulombs to Milliampere Hours

To convert from coulombs to milliampere hours, multiply the value by 0.277778. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Coulombs to Milliampere Hours: mAh = C × 0.277778
  • Milliampere Hours to Coulombs: C = mAh ÷ 0.277778

Coulombs to Milliampere Hours Conversion Chart

Coulombs (C)Milliampere Hours (mAh)
0.10.027778
0.250.069444
0.50.138889
10.277778
20.555556
30.833333
51.388889
102.777778
205.555556
256.944444
5013.888889
10027.777778
25069.444445
1000277.77778

Understanding the Units

What is a Coulomb?

The coulomb is the SI derived unit of electric charge, equal to the charge transported by one ampere in one second (1 C = 1 A·s).

Named after Charles-Augustin de Coulomb (1736–1806), French physicist who quantified the electric force law.

Common contexts: electrostatics, chemistry.

What is a Milliampere Hour?

An ampere-hour equals exactly 3,600 coulombs — a current of one ampere flowing for one hour. It is the standard battery-capacity rating.

Common contexts: battery capacity, power tools, EV.

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FAQ

How do I convert coulombs to milliampere hours?

Multiply by 0.277778. For example, 48 C × 0.277778 = 13.3333 mAh.

What is the formula for coulombs to milliampere hours?

The formula is: mAh = C × 0.277778.

How many milliampere hours are in one coulomb?

One coulomb equals 0.2778 milliampere hours.

How many milliampere hours are in 1 coulomb?

1 C equals 0.277778 mAh.

How do you convert coulombs to milliampere hours?

Multiply the coulomb value by 0.277778. Formula: mAh = C × 0.277778.

How many milliampere hours are in 5 coulombs?

5 C = 1.388889 mAh.

How do you convert milliampere hours back to coulombs?

Use the inverse formula: C = mAh ÷ 0.277778. For example, 1 mAh = 3.6 C.

What is the difference between Coulomb and Milliampere Hour?

The coulomb is the SI derived unit of electric charge, equal to the charge transported by one ampere in one second (1 C = 1 A·s). An ampere-hour equals exactly 3,600 coulombs — a current of one ampere flowing for one hour. It is the standard battery-capacity rating.