Bottleneck calculators, PSU sizing, FPS estimates, compatibility checkers, comparisons, and 35 more free tools. All free, all in your browser, no account required.
Click any tool to start. Everything runs instantly in your browser.
PC Building Toolkitis a free collection of 41 online calculators and checkers for PC builders, gamers, and creators. Whether you're planning your first gaming PC, upgrading an aging rig, or building a workstation for AI or video editing, our tools help you make informed decisions before you spend a dollar.
Start with our flagship to check if your CPU and GPU are well-balanced, then use the to size your power supply. The estimates frame rates across 10 popular games, while the assembles a complete compatible build from your budget and purpose.
Our compatibility checkers cover every part of the build process - CPU, motherboard, RAM, CPU cooler, GPU size, PCIe, NVMe, and PSU - so you can verify your parts list works together before buying. The comparison tools let you pit any two CPUs or GPUs head-to-head with spec tables, performance scores, value calculations, and clear buying verdicts.
For deeper analysis, the rates your build across gaming, content creation, streaming, and AI workloads. The tests readiness for Meta Quest, Rift, and Valve Index, and the tool estimates RT FPS across Cyberpunk, Alan Wake 2, and more.
We also cover the full monitor and display stack - PPI, refresh rate, aspect ratio, viewing distance, HDR tiers, and resolution - plus power and network tools like electricity cost, UPS sizing, streaming bitrate, ping, download time, and bandwidth calculators. Every tool is free, requires no sign-up, and runs entirely in your browser.
Built by PC enthusiasts for PC enthusiasts. No fluff, no paywalls, no sign-ups.
Every tool is free forever. No premium tier, no sign-up, no data collection.
Everything runs in your browser. No waiting, no page reloads, no installs.
48+ CPUs and 50+ GPUs with real benchmark scores, TDP, VRAM, and pricing.
From bottleneck to VR readiness, we cover the entire PC building journey.
Start with our most popular tool - the Bottleneck Calculator.