UPS sizing calculator
What size UPS do you need?
Select your equipment, choose your required backup time, and we'll size the right UPS with safety margins and battery configuration.
Your connected equipment
Computers
Desktop PC
300 W each
Workstation / CAD PC
550 W each
Laptop
65 W each
1U Server
350 W each
Displays
Monitor 22"
25 W each
Monitor 27"
40 W each
Monitor 32"
55 W each
TV / Display 40"
80 W each
Networking
Wi-Fi router
20 W each
Network switch 8p
30 W each
Network switch 24p
80 W each
Modem / ONT
15 W each
Peripherals & Other
Laser printer (idle)
20 W each
POS terminal
60 W each
CCTV DVR / NVR
30 W each
LED light (10W)
10 W each
Custom device
Required backup time
Assumptions
Power factor: 0.8 · Safety margin: 25% · Battery: 12V sealed lead-acid · Battery efficiency: 80% · Charge efficiency: 85%. Lithium UPS will have smaller, lighter batteries. Actual backup time varies with load and battery age.