Tools
Six tools, led by the three that size and sanity-check PC power. Each shows its formula and cited assumptions.
Power tools
PSU Wattage Calculator
Size your power supply with honest headroom math.
Pick your CPU and GPU (or enter wattages manually), add your accessories, and get a recommended PSU wattage with transparent assumptions — minimum, comfortable, and the retail tier to buy.
Open toolGPU Power Connector Checker
Which power cables your graphics card needs.
Select a GPU to see its power connector requirement, estimated board power, a recommended PSU range, whether an ATX 3.x unit makes sense, and the cable safety notes that actually matter.
Open toolUPS Runtime & Sizing Calculator
How big a UPS, and how long will it actually last?
Add up your PC, monitor and network gear, then size a UPS and estimate real battery runtime. Accounts for inverter losses, Peukert capacity fade, battery age and the VA-vs-watts trap — and shows a range instead of a falsely precise minute figure.
Open toolMore utilities
Monitor PPI Calculator
Pixel density, pixel pitch, and viewing distance.
Enter screen size and resolution to get PPI, pixel pitch in millimeters, the retina viewing distance, and a comfortable distance range — plus what the density means for office work, gaming, and design.
Open toolDownload Time Calculator
How long will that download actually take?
Enter a file size and your connection speed to get a realistic download time. Handles the byte-vs-bit mismatch that makes real downloads slower than the advertised Mbps, with an adjustable real-world efficiency factor.
Open toolPC Electricity Cost Calculator
What does your PC cost to run?
Enter your PC power draw, hours of use, and your own local electricity rate to see the daily, monthly, and yearly cost. Rates vary a lot by country and plan, so you enter your own — nothing is assumed.
Open toolBrowse by hardware
Prefer to start from a specific part? These indexes give a ready-made page per model, each with build-time computed numbers.