Use our calculator to easily convert milliamp hours to milliwatt hours (mAh to mWh).
Milliamp Hours to Milliwatt Hours Conversion Calculator
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Milliamp Hours to Milliwatt Hours Conversion Table
Here is a conversion table converting common values of milliamp hours to milliwatt hours at 3.7V and 5V.
| Milliamp Hours (mAh) | Milliwatt Hours (mWh) @ 3.7V | Milliwatt Hours (mWh) @ 5V |
|---|---|---|
| 1000 mAh | 3700 mWh | 5000 mWh |
| 2000 mAh | 7400 mWh | 10000 mWh |
| 3000 mAh | 11100 mWh | 15000 mWh |
| 4000 mAh | 14800 mWh | 20000 mWh |
| 5000 mAh | 18500 mWh | 25000 mWh |
| 6000 mAh | 22200 mWh | 30000 mWh |
| 7000 mAh | 25900 mWh | 35000 mWh |
| 8000 mAh | 29600 mWh | 40000 mWh |
| 9000 mAh | 33300 mWh | 45000 mWh |
| 10000 mAh | 37000 mWh | 50000 mWh |
| 20000 mAh | 74000 mWh | 100000 mWh |
| 30000 mAh | 111000 mWh | 150000 mWh |
| 40000 mAh | 148000 mWh | 200000 mWh |
| 50000 mAh | 185000 mWh | 250000 mWh |
Note: Don't see the values you're looking for in this table? Use our mAh to mWh calculator at the top of this page to calculate them for your specific scenario.
How to Convert Milliamp Hours to Milliwatt Hours (mAh to mWh)
To convert milliamp hours to milliwatt hours, multiply milliamp hours by volts.
Conversion formula: milliwatt hours = milliamp hours × volts
Abbreviated formula: mWh = mAh × V
Example
Imagine your wireless earbuds have a battery capacity of 200mAh and a voltage of 3.7V.
To calculate the earbuds' battery capacity in milliwatt hours, you would multiply its milliamp hours by its voltage:
200 mAh × 3.7 V = 740 mWh
So, your wireless earbuds have a battery capacity of 740 milliwatt hours.
Why Convert Milliamp Hours to Milliwatt Hours?
Converting milliamp hours to milliwatt hours can help you accurately compare the energy storage capacity of batteries with different voltages. This is because the energy a battery can deliver depends on both its milliamp hours and voltage.
For example, let's take two batteries:
- Battery 1: 1,000mAh at 3.7V
- Battery 2: 1,000mAh at 7.4V
At first glance, if you just consider milliamp hours, you might think these two batteries can supply the same amount of energy. However, once you convert their milliamp hours to milliwatt hours, you'll find that Battery 2 can supply twice as much energy as Battery 1.
Battery 1: 1000mAh × 3.7V = 3700mWh Battery 2: 1000mAh × 7.4V = 7400mWh
Another reason to convert milliamp hours to milliwatt hours is when you want to know how long a battery will last when powering a certain device. Let's say you have a device that uses 500 milliwatts of power and you want to power it with Battery 1. You can calculate how long Battery 1 will last by dividing its milliwatt hours by the device's power consumption in milliwatts.
3,700mWh ÷ 500mW = 7.4 hours
So you can expect Battery 1 to power your device for about 7.4 hours before needing a recharge. This calculation wouldn't have been possible without converting milliamp hours to milliwatt hours.
How to Convert Milliwatt Hours to Milliamp Hours (mWh to mAh)
To convert milliwatt hours to milliamp hours, divide milliwatt hours by volts.
Conversion formula: milliamp hours = milliwatt hours ÷ volts
Abbreviated formula: mAh = mWh ÷ V
Example
Let's say you have a 3.2V battery with a 500 mWh capacity.
To calculate your battery's milliamp hours, you would divide its milliwatt hours by its voltage:
500 mWh ÷ 3.2 V = 156.25 mAh
In this example, your battery has a capacity of 156.25 milliamp hours.
