All PC Hardware Calculators
Twenty-two free, client-side calculators for sizing, comparing, and budgeting your PC build. Every tool runs in your browser — no sign-up, no data sent anywhere.
How to choose a calculator
Start with the job, not the tool list. Sizing a power supply or estimating yearly electricity cost belongs to the Power group — the PSU Wattage Calculator and PC Power Draw Estimator both start from your actual CPU and GPU. If you are weighing a purchase, the Build tools (Build Cost TCO, Upgrade ROI, FPS Budget Builder, Compatibility Check) compare price, performance, and part fit in one pass. The Performance group — Bottleneck Estimator, GPU VRAM Recommendation, CPU/GPU FPS Loss, and Quality vs Performance — helps you find the limiter in an existing rig, while the Cooling and Reference tools round out thermals, monitor, storage, and memory checks. Every figure is a planning estimate from typical component specs, so verify the final numbers against your own parts and current reviews before buying.