Power & Backup
Estimate generator size, battery runtime, portable power station capacity, and other backup-power decisions with guided inputs and plain-English results.
5 calculators
Pick the calculator closest to the decision you are trying to make.
Power & Backup
Home Generator Size
Estimate the generator size needed for essential home backup loads during a power outage.
Open calculator → Power & BackupCamping & RV Generator
Estimate generator wattage for RV, camping, cabin, and outdoor power needs.
Open calculator → Power & BackupPower Station Runtime
Estimate how long a portable power station can run common devices.
Open calculator → Power & BackupBattery Runtime
Estimate battery runtime from watt-hours, load, and efficiency.
Open calculator → Power & BackupExtension Cord Voltage Drop
Estimate extension cord voltage drop from one-way cord length, amps, voltage, and AWG wire gauge.
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