Wondering how long your phone will take to charge? Use this free Mobile Battery Charging Time Calculator to estimate charging time based on battery capacity, current battery level, charger power, and your target charge level.
Battery Details
Common phone batteries range from around 3,000 to 6,000 mAh.
Choose the charger's rated power. Your phone may accept less.
Estimated Charging Time
Time to reach target
From 20% to 100% with a 20 W charger
Estimated time varies with charging efficiency and battery temperature.
This calculator provides an estimate. Actual charging time depends on your phone's maximum charging speed, charger and cable compatibility, battery temperature, background activity, and slower charging near full capacity.
How to Calculate Phone Battery Charging Time
The time needed to charge a phone depends on its battery capacity, current charge level, charger power, and the phone's maximum supported charging speed. A larger battery usually takes longer to charge, while a compatible fast charger can reduce charging time.
To use this calculator, enter your battery capacity in mAh, choose your current and target battery percentages, and select your charger's wattage. The calculator estimates how long the charging process may take.
Example
Suppose your phone has a 5,000 mAh battery, is currently at 20%, and you want to charge it to 100% using a 20 W charger. The calculator estimates the charging time using the battery capacity, power efficiency, and slower charging near full capacity.
Your actual charging time may differ because the phone may limit charging speed to protect the battery, particularly when the battery gets hot or approaches 100%.
Charging Time Table
These are illustrative estimates using the same simplified calculation method as the calculator, not manufacturer test results.
| Battery capacity | Charger power | Charge level | Estimated time |
|---|---|---|---|
| 3,000 mAh | 10 W | 20% to 100% | About 1 hr 48 min |
| 4,000 mAh | 18 W | 20% to 100% | About 1 hr 10 min |
| 5,000 mAh | 20 W | 20% to 100% | About 1 hr 9 min |
| 5,000 mAh | 25 W | 20% to 100% | About 55 min |
| 5,000 mAh | 45 W | 20% to 100% | About 31 min |
| 6,000 mAh | 45 W | 20% to 100% | About 36 min |
| 8,000 mAh | 45 W | 20% to 100% | About 48 min |
| 8,000 mAh | 80 W | 20% to 100% | About 27 min |
| 10,000 mAh | 80 W | 20% to 100% | About 34 min |
| 10,000 mAh | 120 W | 20% to 100% | About 23 min |
Note: The table's estimates are rounded examples. The calculator uses a simplified charging model, so its results should be presented as estimates rather than exact charging times.