PC-Build.online

Builds

PC build by budgetBudget build guides

Builder

Laptops

PC Components

Parts

ProcessorsMotherboardsCPU CoolersRAMGraphics CardsCabinetsCase FansSound CardsM.2 SSD HeatsinksGPU Brackets & Riser CablesCMOS BatteriesThermal PasteRGB, Fan Controllers & LED StripsAll components

Compare

GPU vs GPUCPU vs CPUGPU rankingCPU ranking

Tools

Compatibility checkerPSU wattage calculatorFPS calculatorBottleneck calculatorRAM calculatorUPS calculatorCan I run it?Upgrade advisorBudget splitterAll calculators

Games

Guides

BlogHow to build a PCChoosing a CPUChoosing a GPUHow much RAM?Can I run it?FPS calculatorAll guides
IN (shopping country)

UPS calculator

How big a UPS your PC needs, and how long it will keep running during a power cut. Not sure of your PC's draw? Get it from the PSU calculator.

Other things on the UPS (tick and change the watts if yours differ)

Most 600–1100 VA home units have one or two 12 V 7 Ah or 9 Ah batteries; the label on the battery or the UPS manual tells you.

Result
Total load—
Recommended UPS—

    UPS units that fit

    How we estimate backup time: battery energy (volts × amp-hours × batteries), less about 15% lost in the UPS's inverter, and less again because lead-acid batteries give far less of their energy when drained fast (Peukert's law, exponent 1.25). It assumes new batteries at 25 °C; older batteries and heat cut it further. For the most accurate figure, use the runtime chart of the UPS model you buy.

    UPS calculator FAQ

    What size UPS do I need for a gaming PC?

    Take the PC's power draw plus monitors, divide by the UPS power factor (about 0.6 for home line-interactive units) and add headroom. Most gaming PCs need 1000–1500 VA; high-end systems 2000 VA or more.

    Do I need a pure sine wave UPS?

    Modern power supplies with active PFC (almost every 80 Plus unit) can switch off or click on a cheap stepped-wave UPS under load. A pure sine wave UPS is the safe choice for a gaming PC.

    How long will a UPS run my PC?

    Home UPS units are meant to give you a few minutes to save and shut down, not to keep gaming. Backup time drops sharply at high load; use the calculator to estimate it.

    765 models Graphics cards From RTX 5060 to RX 9070 XT: compare VRAM, power and FPS. Shop graphics cards → 117 models Processors Ryzen and Intel Core, with the boards and memory they need. Shop processors → 5,686 models Gaming monitors 1080p, 1440p and 4K, 144 Hz and up. Shop monitors → 8,014 models Laptops Gaming and work laptops with full specs. Shop laptops →
    Popular right now

    Parts people are looking at

    All parts →