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Ampere-hours to Milliampere-hours Converter

Convert ampere-hours to milliampere-hours and mAh to Ah instantly. Bidirectional battery capacity converter with formula and common values.

Ah

Milliampere-hours

3,700

mAh

3.7 Ah = 3,700 mAh

mAh = Ah × 1000

Ampere-hours to Milliampere-hours: 1 Ah equals 1000 mAh. To convert ampere-hours to milliampere-hours, multiply by 1000 (mAh = Ah × 1000). For example, 10 Ah = 10000 mAh.

How to Convert Ampere-hours to Milliampere-hours

To convert from ampere-hours to milliampere-hours, multiply the value by 1000. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Ampere-hours to Milliampere-hours: mAh = Ah × 1000
  • Milliampere-hours to Ampere-hours: Ah = mAh ÷ 1000

Ampere-hours to Milliampere-hours Conversion Chart

Ampere-hours (Ah)Milliampere-hours (mAh)
0.1100
0.25250
0.5500
11000
22000
33000
55000
1010000
2020000
2525000
5050000
100100000
250250000
10001000000

Understanding the Units

What is an Ampere-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.

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 many milliampere-hours are in one ampere-hour?

One ampere-hour equals exactly 1,000 milliampere-hours (mAh). The milli- prefix denotes one-thousandth of the base unit.

How do I convert Ah to mAh?

Multiply the capacity in ampere-hours by 1,000. For example, 3.7 Ah × 1,000 = 3,700 mAh.

Why are phone batteries rated in mAh?

Milliampere-hours provide a convenient scale for consumer electronics. A 5,000 mAh phone battery sounds more intuitive than 5 Ah for the typical user.

What is the difference between Ah and mAh?

Both measure electric charge (battery capacity). Ah is used for larger batteries (cars, UPS), while mAh is used for smaller ones (phones, earbuds, power banks).

Does mAh indicate how long a battery lasts?

Partially. A 5,000 mAh battery can deliver 500 mA for 10 hours or 1,000 mA for 5 hours, but actual runtime depends on voltage, efficiency, and power draw.

How many milliampere-hours are in 1 ampere-hour?

1 Ah equals 1000 mAh.

How do you convert ampere-hours to milliampere-hours?

Multiply the ampere-hour value by 1000. Formula: mAh = Ah × 1000.

How many milliampere-hours are in 5 ampere-hours?

5 Ah = 5000 mAh.

How do you convert milliampere-hours back to ampere-hours?

Use the inverse formula: Ah = mAh ÷ 1000. For example, 1 mAh = 0.001 Ah.

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