About SpecsCalc
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SpecsCalc publishes free calculators and guides for people choosing PC hardware. The aim is narrow and specific: take the questions builders actually ask — what power supply do I need, will this card fit, is this pairing sensible — and answer them with arithmetic you can check rather than an opinion you have to trust.
Who runs this site
SpecsCalc is a one-person project. It is built and maintained by Weerasak, an independent web developer based in Thailand who has been assembling and repairing desktop PCs for personal use for years and who got tired of hardware calculators that print confident numbers with no working shown.
That is worth being plain about, because it sets the boundaries of what this site can claim. SpecsCalc is not a benchmark laboratory. It does not run instrumented power measurements, it does not receive review samples, and it does not have a test bench. What it does have is published manufacturer specifications, transparent formulas and a rule that an unknown value is reported as unknown.
Where the numbers come from
- Component specifications — NVIDIA, AMD and Intel product specification pages for board power, minimum supply recommendations and connector types.
- Case clearances — the case manufacturer’s own support or specification page, recorded per configuration, because one case often publishes several different limits.
- Card dimensions — board-partner product pages for the exact retail model, since two versions of the same GPU routinely differ by tens of millimetres.
- Our own models — the power-headroom multiplier, the bottleneck weights and the VRAM overhead estimate are editorial judgement. They are published in full in the in-depth guides so they can be argued with.
Editorial standards
- No invented precision. We do not publish a bottleneck percentage or a predicted frame rate, because tier indices cannot produce either honestly.
- Unknown stays unknown. If a manufacturer does not publish a figure, the tool says so instead of estimating a pass.
- Every page carries a review date and states which of its numbers are manufacturer specifications and which are our estimates.
- Commercial links never change a recommendation. Parts are chosen first; affiliate links are added afterwards, and only to products that were already the pick.
- No prices on the page. Amazon’s terms only permit displayed prices pulled live from their API, so we show none at all rather than a stale number.
How we handle corrections
Errors get fixed and the page shows a new review date. If you find a wrong figure, email turnomega@gmail.com with the page address and the correct value or a source, and it will be checked against the manufacturer’s own page. Substantive corrections to a calculation are noted on the methodology page alongside the change.
The tools themselves are covered by a regression test suite that runs before every deployment, so a fix to one calculation cannot silently break another.
How the site is funded
SpecsCalc is free and has no accounts, paywalls or newsletters. It is funded in two ways. Some links to retailers are affiliate links: as an Amazon Associate we may earn from qualifying purchases at no additional cost to you. The site also carries advertising. Neither affects which parts are recommended, and both are described in detail in the privacy and advertising disclosure.
Contact
Questions, corrections and suggestions are all welcome at turnomega@gmail.com — more detail on what helps is on the contact page.