UPS Runtime Chart: 600VA to 1500VA by Load

Answer
33m 1000VA at 150 W

Runtime of common UPS sizes at each load, with their typical battery packs. A 1000VA UPS runs an office PC and monitor (150 W) for about 33m.

Free, no sign-upInstant resultsUpdated October 2026

UPS Runtime Chart

Load600VA · 12 V 7 Ah1000VA · 24 V 7 Ah1500VA · 24 V 9 Ah
20 W · Router + modem2h 43m6h 13m8h 25m
50 W · Router, modem + 2 cameras54m2h 4m2h 48m
100 W · Laptop + router24m54m1h 13m
150 W · Office PC + monitor14m33m45m
200 W · NVR with 8 cameras10m24m32m
300 W · Desktop PC + 2 monitors6m14m20m
450 W · Gaming PC (light load)–9m12m
600 W · Gaming PC (gaming)–6m9m
900 W · Small server rack––5m

New batteries at 25 °C, 90% inverter efficiency, Peukert k = 1.2. A dash means the load exceeds that UPS's watt rating.

W
Sum of connected equipment.
W
Optional: 0 to skip.
V
Two 12 V batteries = 24 V.
Ah
%
Runtime
–
How we calculated this

    For estimating and educational purposes only. Results are approximate and are not a substitute for a licensed professional, the manufacturer's instructions or your local code. Disclaimer

    More questions like this

    How Long Will a UPS Run a Wi-Fi Router and ModemHow Long Will a 600VA UPS LastHow Long Will a 1,000VA UPS LastHow Long Will a 1,500VA UPS LastAll quick answers

    How to read this chart

    Find your load in watts (add up the labels of everything plugged into the UPS, or measure it with a plug-in meter) and read across. Runtime falls fast as load rises, so moving the printer or a second monitor off the UPS can double your backup time.

    Frequently asked questions

    How do I find how many watts my equipment uses?

    Use a plug-in watt meter for a few minutes, or add the watts on each power adapter label (labels show the maximum, so real use is usually lower).

    How long should a UPS last?

    Most home and office UPS units are sized for 5–15 minutes at full load: enough to ride through short outages and shut down safely.

    Open the full calculator: UPS Runtime Calculator →