What does UPS & Battery Runtime Calculator do?

Estimate UPS runtime and battery planning values for IT equipment and backup power scenarios.

Network engineers, sysadmins, DevOps teams, security learners, and technical operators can use this browser-based workflow.

Infrastructure Power Planner

Calculate theoretical backup runtime for UPS systems and battery banks based on critical load and discharge efficiency models.

Total Load (Watts)

Battery Capacity (Ah)

Battery Voltage (V)

Efficiency Factor

1.7 Estimated Backup Hours

Approximately 102 minutes of uptime.

The Physics of Power

UPS (Uninterruptible Power Supply) sizing is critical for data center reliability. The runtime depends on the total chemical energy stored in the batteries versus the rate of consumption (Watts).

The Calculation: `Runtime (h) = (Ah * V * Efficiency) / Load (W)`. Standard Lead-Acid batteries should not be discharged below 50% for longevity, though this calculator assumes a full discharge model for maximum capacity estimation.

Efficiency Loss: Power conversion from DC (Battery) to AC (Outlets) incurs roughly a 10-20% loss due to heat generated by the inverter's transformers and switching circuitry.