PC hardware calculators
Free PC Hardware Calculators & Computer Tools
Calculate, compare and optimize your PC before you buy, build or upgrade.
- Free
- No sign-up
- Runs in your browser
- Formula shown on every tool
Bottleneck check · example
Specs-based estimate. Try your own parts in the full calculator.
Open Bottleneck Calculator →ComputingSkill is a free collection of PC hardware calculators and computer tools for anyone planning a new build, an upgrade or their first gaming PC. Choose your parts and the calculators estimate how well a CPU and GPU pairing is balanced at 1080p, 1440p and 4K, roughly what FPS to expect, how much power supply wattage the build needs, and how much RAM, VRAM and storage you are likely to use. Every tool runs in your browser with no account and no sign-up. Results are specs-based estimates, not lab benchmarks, and each calculator explains its formula and its limits so you can see how a number was reached. Hardware specs come from manufacturer pages, and our methodology page describes the full approach.
Featured Calculators
PC Hardware Calculators
Computer Tools
Hardware Resources
Popular Guides
Popular GPU & CPU Bottleneck Pages
CPU-bound GPU-bound Balanced (under 6%)
Latest Articles
Why Use ComputingSkill?
Free, no sign-up
Every calculator and tool works instantly in your browser — no account, no email wall.
Transparent methodology
Every result explains its formula and its limitations. We never dress up an estimate as a lab measurement.
Manufacturer-sourced specifications
Hardware specs used in our calculators come from manufacturer data, not guesswork.
Built for mobile too
Every tool is designed to work as well on a phone as it does on a desktop.
Frequently Asked Questions
Are the calculators on ComputingSkill really free?
Yes. Every calculator, converter and guide on this site is free to use, with no account required.
How accurate are the bottleneck and FPS estimates?
They are specs-based estimates designed to catch obviously mismatched hardware pairings and give you a general sense of what to expect — not lab-measured benchmark results. Actual performance depends on the specific game, drivers, RAM and settings.
Where do the hardware specifications come from?
From manufacturer and publisher specification pages. We do not invent specifications or benchmark scores — and if you spot a spec that looks wrong, please use the contact page to flag it so we can check it against the source and correct it.