Power Bank Charging Time Calculator
Estimate how long it will take to charge a power bank based on its capacity, current charge level and charging input power.
How is power bank charging time calculated?
Charging time depends on the power bank capacity, charging input power, battery charge level and charging efficiency. Actual charging can take longer than a simple capacity-to-wattage calculation because charging power normally decreases as the battery approaches full charge.
Example
A 20,000mAh power bank charging at 30W will not necessarily charge from 0% to 100% in exactly the time calculated by dividing battery energy by 30W. Conversion losses, temperature and charging-current tapering can increase the actual charging time.
Important
This calculator provides an estimate. Actual charging time varies by power bank design, USB-C Power Delivery profile, charger, cable, battery condition and charging temperature.
Power Bank Charging Time Calculator
Estimate how long it will take to charge a power bank based on its capacity, current charge level and charging input power.
How is power bank charging time calculated?
Charging time depends on the power bank capacity, charging input power, battery charge level and charging efficiency. Actual charging can take longer than a simple capacity-to-wattage calculation because charging power normally decreases as the battery approaches full charge.
Example
A 20,000mAh power bank charging at 30W will not necessarily charge from 0% to 100% in exactly the time calculated by dividing battery energy by 30W. Conversion losses, temperature and charging-current tapering can increase the actual charging time.
Important
This calculator provides an estimate. Actual charging time varies by power bank design, USB-C Power Delivery profile, charger, cable, battery condition and charging temperature.