UPS Backup Time Calculator

Calculate UPS load, battery energy and estimated backup time.

UPS KVA

DC Voltage (V)

Battery Ah

Battery Count

Efficiency (%)

PC Count

Watt per PC

Calculation Result

Total Load (W)—

Battery Energy (Wh)—

Backup Time (Hours)—

Backup Time (Hours & Minutes)—

Formulas
Total Load (W) = PC Count × Watt per PC
Battery Energy (Wh) = DC Voltage × Battery Ah × Battery Count × (Efficiency ÷ 100)
Backup Time (Hours) = Battery Energy ÷ Total Load
Backup Time (Hours & Minutes) = INT(Backup Time) and rounded remaining minutes

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