Convert mAh to Ah Instantly

Quickly translate milliamp-hours into amp-hours for any battery pack. Ideal for matching datasheets, sizing backup power, or verifying that 2,000 mAh really equals 2.0 Ah.

Quick Reference

Divide milliamp-hours by 1,000

2,000 mAh ÷ 1,000 = 2.0 Ah
10,400 mAh ÷ 1,000 = 10.4 Ah

mAh to Ah Calculator

Enter any milliamp-hour value and get the amp-hour equivalent instantly.

Most lithium-ion cells list capacity in mAh.

Conversion Result

0
Amp Hours (Ah)

Enter a value to convert.

Formula

Ah = mAh ÷ 1,000

1 amp-hour equals 1,000 milliamp-hours because "milli" = 1/1,000.

Battery Runtime Tip

After converting to Ah, divide by the load current (amps) to estimate runtime. Example: 5,200 mAh = 5.2 Ah. With a 1.3 A draw, runtime ≈ 4 hours (5.2 ÷ 1.3).

Why divide mAh by 1,000?

Battery manufacturers often rate small cells in milliamp-hours because the numbers are easier to read (e.g., 2,600 mAh instead of 2.6 Ah). Since milli (m) is the SI prefix for one-thousandth, you convert by dividing by 1,000. This relationship is outlined in standard reference tables and cell datasheets, including RapidTables conversion charts and Redway Power's battery guides.

Step-by-step

  • 1. Write the battery capacity in mAh (e.g., 10,000 mAh).
  • 2. Divide by 1,000 → 10,000 ÷ 1,000 = 10 Ah.
  • 3. Use Ah for runtime, inverter sizing, or comparing to spec sheets.

Need the reverse?

Multiply Ah by 1,000 to go back to mAh (e.g., 4.5 Ah × 1,000 = 4,500 mAh).

Common Battery Sizes

Phone Power Bank

10,000 mAh

10 Ah

AA NiMH Pack

2,400 mAh

2.4 Ah

Portable Fridge Battery

42,000 mAh

42 Ah

LiFePO₄ Pack

100,000 mAh

100 Ah

mAh to Ah Reference Table

Use this quick lookup when you just need the numbers.

mAh Ah Typical Use Case
500 mAh 0.5 Ah Small IoT sensor, LED light
2,000 mAh 2.0 Ah Smartphone battery pack
5,000 mAh 5.0 Ah Wi-Fi hotspot, drone battery
10,000 mAh 10 Ah Power bank, CPAP backup
20,000 mAh 20 Ah Portable fridge, camping battery
50,000 mAh 50 Ah Solar generator module
100,000 mAh 100 Ah RV house battery

Frequently Asked Questions

Answers sourced from industry guides, including RapidTables and Redway Power.

Is 2,000 mAh the same as 2.0 Ah?

Yes. Divide by 1,000 and you get 2.0 Ah. Manufacturers often list 2,000 mAh because it instantly conveys a higher number even though it is the same capacity.

Why use mAh instead of Ah?

Portable electronics rarely exceed 10 Ah, so expressing capacity in mAh avoids decimals. Larger systems—such as solar batteries or RV packs—use Ah because capacities are well above 10 Ah.

How do I convert Ah back to mAh?

Multiply the amp-hour value by 1,000. Example: 12 Ah × 1,000 = 12,000 mAh.

Does voltage matter when converting mAh to Ah?

No. mAh and Ah are both measures of charge (current over time). Voltage becomes important only when converting to watt-hours (energy).