Battery Runtime Calculator
Estimate how long a battery or UPS will run a load from its amp-hour rating, voltage, depth of discharge and inverter efficiency.
Ah
V
Total energy scales with the number of batteries, in series or parallel.
%
Lead-acid ~50%, AGM ~50–60%, LiFePO₄ ~80–90%.%
Use 100% for a DC load.Formula
Runtime (h) = Ah × V × DoD × η ÷ Load (W)