Wh to mAh Converter
Converting laptop power bank ratings to phone recharge cycle equivalents. Calculates milliamp-hour capacity from total watt-hours and operating voltage.
Step-by-Step Derivation ▼ Show Steps
Calculations adhere to standard electrical equations and National Electrical Code guidelines.
Engineering Principles & Calculations
This calculator uses the exact mathematical relationships between Energy (Wh), Voltage (V) to determine Capacity (mAh, Ah). In practical applications, electrical systems must account for safety derating factors, nominal vs actual voltages, and conductor resistance losses.
Calculates milliamp-hour capacity from total watt-hours and operating voltage.
Typical Application & Best Practices
Converting laptop power bank ratings to phone recharge cycle equivalents.
Wh to mAh Converter Benchmark Lookup Table
| Watt-Hours (Wh) | Voltage (V) | Milliamp-Hours (mAh) | Amp-Hours (Ah) |
|---|---|---|---|
| 18.5 Wh | 3.7 V | 5,000 mAh | 5.0 Ah |
| 37.0 Wh | 3.7 V | 10,000 mAh | 10.0 Ah |
| 74.0 Wh | 3.7 V | 20,000 mAh | 20.0 Ah |
| 99.9 Wh | 3.7 V | 27,000 mAh | 27.0 Ah |
| 100.0 Wh | 12.0 V | 8,333 mAh | 8.33 Ah |
| 300.0 Wh | 12.0 V | 25,000 mAh | 25.0 Ah |