Uninterrupted Power Supply Calculator

System (AC power line) Voltage = volts (all devices)
Device Power Load in Watts or Amps
Computer Load = watts amps
Monitor Load = watts amps
Any external modem = watts amps
Any external powered hub = watts amps
Any external router or switch = watts amps
Any external powered speakers = watts amps
Any external powered USB device = watts amps
Any external powered drive = watts amps
Any external powered camera = watts amps
Any external powered other device = watts amps
Minimum UPS Capability = VoltAmps
Suggested UPS Capability = VoltAmps

Uninterrupted Power Supply Formula

Minimum UPS Capability = System (AC) Voltage × ( addition of all device amps value ) + 1.4 × ( addition of all device watts value )

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