Know Exactly How Long Your Backup Power Will Last.
Use practical power station and battery runtime calculators to match your backup system with refrigerators, routers, laptops, CPAP machines and everyday appliances.
Brand-neutral estimatesNo signupReal-world efficiency included
Runtime, not guesswork
Turn battery capacity and appliance load into an understandable time estimate.
Appliance-aware
Plan for running watts, startup surges and the devices that matter during an outage.
Efficiency included
Account for inverter losses and usable capacity instead of relying on ideal laboratory numbers.
What do you need to keep running?
Start with your backup system or choose a real-life scenario. Every tool explains its assumptions so you can plan with confidence—not a best-case marketing number.
Power Station Runtime Calculator
Estimate usable hours from battery capacity, appliance load and real-world inverter efficiency.
For portable power stations, solar generators and emergency backup.
Battery Backup Time Calculator
Convert volts and amp-hours into a practical runtime estimate without doing the electrical math yourself.
For UPS systems, battery banks and inverter setups.
Refrigerator Backup Calculator
Plan for compressor cycling and startup surge so your fridge estimate is closer to real use.
For refrigerators, freezers and outage planning.
Home Office Backup Calculator
Combine your router, laptop, monitor and essential devices into one backup-power plan.
For remote work, study rooms and small offices.
Not sure how many watts your appliance uses?
Check practical running-watt and startup-surge ranges before calculating runtime.