Battery Capacity Calculator

Calculate how much battery capacity (Wh) you need based on your devices and usage.
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Calculate Required Battery Capacity

How to Use This Calculator

  1. Add all devices you want to power
  2. Enter each device's wattage (usually on the label or power brick)
  3. Enter hours of use per day
  4. The calculator adds 20% buffer for efficiency losses
  5. Result shows minimum battery capacity needed