Ah to mAh & mAh to Ah Calculator
Convert Ampere-hours (Ah) to Milliampere-hours (mAh) accurately. Use this tool to evaluate battery capacity for lithium-ion packs, power banks, and rechargeable electronics.
How to Use Ah to mAh Calculator
Converting your battery capacity from Ampere-hours (Ah) to Milliampere-hours (mAh) is very simple using our tool.
- 1Enter the battery capacity value in Ampere-hours (Ah) into the input field.
- 2Ensure the entered value is a positive number representing your battery rating.
- 3Click the Calculate mAh button to perform the conversion.
- 4View the converted value in Milliampere-hours (mAh) displayed in the results panel.
- 5Use the Reset button to clear the input and calculate a new value.
How to Calculate Ah to mAh
To convert battery capacity from Ampere-hours (Ah) to Milliampere-hours (mAh), you multiply the Ah value by 1000. This is because there are 1000 milliamperes in one ampere.
Example Calculation
Convert a 2.5 Ah lithium-ion battery into mAh.
Given:
- Battery capacity: 2.5 Ah
Calculation:
2.5 × 1000 = 2500
Final answer:
2.5 Ah = 2500 mAh
More Conversion Examples
- 0.5 Ah = 500 mAh
- 1 Ah = 1000 mAh
- 3 Ah = 3000 mAh
- 5 Ah = 5000 mAh
- 10 Ah = 10000 mAh
Ah to mAh Chart
The following reference table provides standard capacity conversions from Ah to mAh.
| Ampere-hours (Ah) | Milliampere-hours (mAh) |
|---|---|
| 0.1 Ah | 100 mAh |
| 0.2 Ah | 200 mAh |
| 0.5 Ah | 500 mAh |
| 1 Ah | 1000 mAh |
| 1.5 Ah | 1500 mAh |
| 2 Ah | 2000 mAh |
| 2.5 Ah | 2500 mAh |
| 3 Ah | 3000 mAh |
| 4 Ah | 4000 mAh |
| 5 Ah | 5000 mAh |
| 6 Ah | 6000 mAh |
| 7 Ah | 7000 mAh |
| 8 Ah | 8000 mAh |
| 9 Ah | 9000 mAh |
| 10 Ah | 10000 mAh |
| 20 Ah | 20000 mAh |
| 50 Ah | 50000 mAh |
| 100 Ah | 100000 mAh |
Note: This table assumes the standard relationship of 1 Ah = 1000 mAh.
How to Convert mAh to Ah
There are 1,000 milliamp-hours in one amp-hour, so divide a mAh rating by 1,000 to get Ah. Phone and power bank batteries are usually rated in mAh, while car, solar and UPS batteries use Ah.
Example: a 5,000 mAh power bank holds 5,000 ÷ 1,000 = 5 Ah.
| Capacity (mAh) | Capacity (Ah) | Energy at 3.7 V (Wh) |
|---|---|---|
| 500 | 0.5000 | 1.85 |
| 1,000 | 1.00 | 3.70 |
| 2,000 | 2.00 | 7.40 |
| 3,000 | 3.00 | 11.10 |
| 5,000 | 5.00 | 18.50 |
| 10,000 | 10.00 | 37.00 |
| 20,000 | 20.00 | 74.00 |
Ah to mAh Frequently Asked Questions
Converting Amp-hours to milliamp-hours is a very straightforward process that only requires multiplying the Ah value by one thousand. This basic conversion is necessary because smaller electronic devices commonly list their internal battery capacities in mAh rather than the larger Ah standard.
The only difference between Ah and mAh is the scale of measurement used for the battery capacity. Amp-hours (Ah) are typically used for large batteries in vehicles and solar setups, whereas milliamp-hours (mAh) are used for tiny batteries found inside mobile phones, smartwatches, and small gadgets.
A 10Ah battery contains exactly ten thousand milliamp-hours (10,000 mAh). You calculate this by multiplying the ten Amp-hours by the conversion factor of one thousand. This large capacity is typically enough to completely recharge a standard modern smartphone approximately two or three times over.
Manufacturers prefer using milliamp-hours (mAh) for power banks because consumer electronics like smartphones and wireless earbuds specify their internal batteries in mAh. Using the exact same unit makes it significantly easier for users to estimate how many full recharges their power bank can provide.
A higher mAh rating directly indicates a larger energy storage capacity, meaning your device will run longer between charges. However, batteries with higher mAh ratings are generally physically larger and heavier, which can make your portable electronic devices much more bulky and difficult to carry.
To convert milliampere-hours (mAh) to Ampere-hours (Ah), you simply divide the mAh value by 1000. For example, a power bank with a capacity of 10,000 mAh is equal to 10 Ah. This conversion is helpful when comparing small device batteries to larger energy storage systems that use Ah ratings.
