UPS Battery Runtime Calculator: Estimate Your Backup Power Duration

Calculate Your UPS Backup Time

The combined power usage of all devices connected to the UPS.
The nominal voltage of your entire battery bank (e.g., 12V, 24V, 48V).
The total Ampere-hour rating of your battery bank.
Typical values are 80-95% for most UPS systems.

UPS Runtime Results

Your UPS battery bank is estimated to provide power for approximately:

0.00 Hours

This translates to: 0 minutes.

Use our free UPS Battery Runtime Calculator to accurately predict how long your Uninterruptible Power Supply will power your critical equipment during an outage. Input your load, battery specifications, and efficiency to get an instant estimate and ensure continuous operation for your servers, computers, and networking gear.

Formula:

The UPS battery runtime is calculated using the following formula:

Runtime (Hours) = (Bank Capacity (Ah) × Bank Voltage (V) × Efficiency (%)) / (Load (W) × 100)

  • Bank Capacity (Ah): The total Ampere-hour rating of your battery bank.
  • Bank Voltage (V): The total DC voltage of your battery bank (e.g., 12V, 24V, 48V).
  • Efficiency (%): The discharge efficiency of your UPS system, typically between 80-95%.
  • Load (W): The total power consumption in Watts of all connected devices.

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