mAh to Wh Converter
Power bank airline travel compliance, drone battery rating, smartphone battery comparisons. Converts battery milliamp-hours and cell nominal voltage (3.7V Li-ion, 1.2V NiMH, 3.2V LiFePO4) into Watt-hours.
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 Capacity (mAh), Nominal Voltage (V - with presets for 3.7V, 7.4V, 11.1V, 12V) to determine Energy (Wh), Flight Airline Limit Check (≤100Wh TSA Safe). In practical applications, electrical systems must account for safety derating factors, nominal vs actual voltages, and conductor resistance losses.
Converts battery milliamp-hours and cell nominal voltage (3.7V Li-ion, 1.2V NiMH, 3.2V LiFePO4) into Watt-hours.
Typical Application & Best Practices
Power bank airline travel compliance, drone battery rating, smartphone battery comparisons.
mAh to Wh Converter Benchmark Lookup Table
| Power Bank Rating | Internal Voltage | Energy Capacity (Wh) | TSA Flight Limit Status |
|---|---|---|---|
| 5,000 mAh | 3.7 V (1-Cell Li-ion) | 18.5 Wh | Approved (Carry-on) |
| 10,000 mAh | 3.7 V (1-Cell Li-ion) | 37.0 Wh | Approved (Carry-on) |
| 20,000 mAh | 3.7 V (1-Cell Li-ion) | 74.0 Wh | Approved (Carry-on) |
| 26,800 mAh | 3.7 V (1-Cell Li-ion) | 99.16 Wh | Max Legal Carry-On (Under 100Wh) |
| 30,000 mAh | 3.7 V (1-Cell Li-ion) | 111.0 Wh | Requires Airline Approval (100-160Wh) |
| 50,000 mAh | 3.7 V (1-Cell Li-ion) | 185.0 Wh | Prohibited on Passenger Flights |