Phone charge speed calculator
Calculate percentage points gained per hour from two battery readings and elapsed minutes.
Calculate percentage points gained per hour from two battery readings and elapsed minutes.
Estimated result
Use the calculator
Enter start percent, end percent, elapsed minutes. The calculation runs locally in this browser and returns percentage points per hour.
Read the estimate carefully
Use the result as a comparison point for similar sessions, not as a hidden sensor reading or a hardware diagnosis.
- Percentage is a rounded software reading.
- This result is a speed estimate and does not reveal charger wattage.