About

Power Station Runtime Calculator is a free utility for estimating how long a portable power station can run common appliances and what size station may be needed for a target runtime.

The calculator is designed for planning and comparison. It uses transparent watt-hour formulas and shows the assumptions behind each result, including reserve, battery health, conversion efficiency, average load, and startup requirements.

Product suggestions are matched against published capacity and output specifications in the local catalog. They are not a guarantee of field performance, and users should always confirm the latest manufacturer specs before buying or connecting high-startup appliances.