This is the full collection of PC hardware calculators on computingskill.com/. Each one takes a narrow, practical question — will this CPU bottleneck that GPU, how big a PSU do I actually need, how much will this build cost, how much RAM is enough — and turns it into a specs-based estimate you can get an answer to in under a minute. None of these tools require you to install anything, create an account, or run a benchmark on your own machine; you enter the parts or numbers you have (or are considering), and the calculator applies published specifications and standard formulas to give you a directional answer.
These calculators are aimed at people actually building, upgrading, or troubleshooting a PC — not people who already have a lab full of benchmarking rigs. If you’re picking parts for a new build, deciding whether an old CPU is worth pairing with a new GPU, sizing a power supply so it doesn’t trip under load, or just trying to understand why a “fast” PC still stutters, there’s a tool here for that. Every calculator page also explains, in plain language, how the underlying math works and where its estimates fall short — we’d rather you understand the limits of a number than treat it as gospel.
A couple of these tools are especially useful as a starting point if you’re new to PC building: the PC Bottleneck Calculator and the PC Build Cost Calculator are good first stops before you start shopping for parts, and the PC Compatibility Checker is worth a pass before you finalize any parts list. From there, the more specific calculators below help you dial in individual components — power, cooling, memory, and expected performance.
Performance & Compatibility
Power, Cooling & Build Planning
Memory, Upgrades & VRAM
Frequently Asked Questions
"Are
No, and we're upfront about that on every calculator page. They use published specifications and established formulas to produce a reasonable estimate, not a measured result from running actual software on real hardware. Use them to narrow down decisions and sanity-check a build, not as a guarantee of the exact number you'll see in practice.
"Which
Most people planning a build from scratch get the most value starting with the PC Build Cost Calculator to set a budget, then the PC Bottleneck Calculator to check that the CPU and GPU you're considering are reasonably matched, followed by the PSU Calculator to size the power supply correctly.
"Do
It helps, since more specific inputs produce more specific estimates, but most calculators here work with general specs too (core counts, clock speeds, wattages) if you don't have an exact model in mind yet.
"Are
Yes. All of the calculators on computingskill.com/ are free, with no account or sign-up required.