Wh to mAh Calculator
Convert watt-hours to milliamp-hours in seconds with our Wh to mAh calculator. This guide helps you understand battery capacity and energy conversion clearly. Use simple steps to calculate accurate values for any device or battery.
Energy to Capacity Converter
How to Use Wh to mAh Calculator
Follow these simple steps to use a Wh to mAh calculator:
- Enter Energy Value: Enter the energy value in watt-hours (Wh).
- Input Voltage: Input the battery voltage (V).
- Calculate: Click the calculate button.
- View Result: View the result in milliamp-hours (mAh).
- Always use the correct voltage of your battery.
- Double-check your input values for accuracy.
- Use standard voltage values like 3.7V for lithium batteries.
How to Convert Wh to mAh
To convert Wh to mAh, use this formula:
Step-by-Step Example
Example: Convert 10 Wh to mAh using a 3.7V battery.
Step 1: Write the formula
mAh = (Wh × 1000) ÷ V
Step 2: Insert values
mAh = (10 × 1000) ÷ 3.7
Step 3: Calculate
mAh = 10000 ÷ 3.7
Step 4: Final result
mAh ≈ 2702.7
Answer: 10 Wh ≈ 2703 mAh at 3.7V
Wh to mAh Conversion Chart
Voltage: 3.7V (common lithium-ion battery)
| Watt-hours (Wh) | Milliamp-hours (mAh) |
|---|---|
| 1 Wh | 270 mAh |
| 5 Wh | 1351 mAh |
| 10 Wh | 2703 mAh |
| 20 Wh | 5405 mAh |
| 50 Wh | 13514 mAh |
| 100 Wh | 27027 mAh |
Note: Values are approximate and based on 3.7V.
FAQs About Wh to mAh Calculator
A Wh to mAh calculator converts energy (Wh) into battery capacity (mAh) using voltage.
Voltage defines how energy translates into charge. Without voltage, you cannot convert Wh to mAh.
Most lithium-ion batteries use 3.7V as the nominal voltage.
Yes. Use this formula: Wh = (mAh × Voltage) ÷ 1000
Higher mAh means more capacity, but actual performance depends on voltage and device usage.
You can use it for power banks, smartphones, laptops, and battery packs.
The formula gives accurate results, but real-world efficiency may vary slightly.
You will get incorrect mAh values. Always use the correct battery voltage.
Final Thoughts
A Wh to mAh calculator makes battery conversion simple and fast. Use the correct formula and voltage to get accurate results. This guide helps you calculate and understand battery capacity with confidence.