Free Tool
Power Station Runtime Calculator
How long will a portable power station actually run your gear? Enter the battery size and what you're powering.
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estimated runtime
Estimates only. Real runtime varies with temperature, battery age, and device startup surges. Rule of thumb: usable capacity ≈ rated Wh × efficiency.
How this works
Runtime ≈ (battery capacity in Wh × inverter efficiency) ÷ device wattage. A 1000 Wh station running a 60 W laptop at 85% efficiency lasts roughly 14 hours. High-wattage appliances (kettles, heaters, hair dryers) drain a station in minutes.
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