Spec & unit checker
Save what you’re shopping for. On any product page, Does It Fit? tells you whether it actually fits — and does the unit conversion for you.
The page lists 45mm. That’s 1.77in — inside 5% of your 1.75in target.
How it works
Type it plainly — “1.75 inch round plate, stainless” — or highlight it on a page. Now it’s something we can check for you.
Amazon, Home Depot, a random shop — anywhere. One click reads the visible specs.
Each requirement shows ✓ fit, ≈ close, or ✕ no — with the number and the conversion behind it.
A worked example
You need a mount around 1.75in. This listing is spec’d in mm and buries the number in the title. Does It Fit? converts and compares — no calculator, no guessing.
45mm = 1.77in, within your 5% tolerance.
4.5in is 60% over your 2.8in — this plate is far too wide.
1.9L is just under 2L — close, off by 5%.
What it converts
The conversions are exact — real math, double-checked. No guesswork.
Your data
No background tracking, no browsing history. A page’s text is read only the moment you click “Match this page,” and only on sites you’ve allowed. Your saved requirements live in your own account.
Read the privacy policyQuestions
Any product page on the web. The first time you match a new site, Chrome asks you to allow it — once, then it remembers.
Yes. The conversions are real math, thoroughly checked — the same answer every time. AI only reads the page and writes the plain-English note; it never decides whether something fits.
Free.