About & Methodology
Under Sink Fit turns cabinet measurements into safe organizer sizes using published, deterministic rules: a 0.5 in margin, estimated plumbing bands, height ceilings and the door opening as a hard limit. Recommendations are size classes with search links, never invented prices or reviews.
What this site is
Under Sink Fit is a measurement-first buying aid for under-sink storage. It exists because the thing that decides fit — your plumbing — never appears in a product listing. The site asks for the numbers a listing cannot know, applies published rules, and returns sizes that are safe to shop.
The rules, in the open
Every result is deterministic: the same inputs always produce the same outputs. The core constants: a 0.5 in safety margin on width and depth; a center plumbing band estimated at 28% of cabinet width (5–8 in) for a centered trap and 36% (7.5–11 in) for a disposal; a side-pipe band of 30% (5–8 in); rear losses of 1.5 in for protruding valves, 3.5 in for a filter or tank, 2 in for rear-wall plumbing; height ceilings of 10 in for a low trap and usable height minus 2 in for a mid trap; and the clear door opening as a hard pass-through limit for rigid boxes. These are conservative planning values drawn from common US trap and disposal geometry; your tape measure always overrides them.
What the recommendations are
Size classes, not specific models: honest dimension targets like “narrow slide-out, shop at or under 8 in wide.” Links search Amazon for that class. The site shows no prices, no star ratings and no availability claims, because it cannot verify them; the product’s own specification table makes the final call.
Units and audience
Written for US cabinets, in inches, with a one-tap centimeter toggle on results. Content is reviewed when the underlying rules or reference tables change; each page carries its date in the page metadata.
Contact and corrections
Spotted a number that does not match your cabinet reality? Email [email protected] — reference-table corrections ship fast.
Common questions
Does Under Sink Fit sell products?
No. It provides measurements, fit rules and size targets, with links that search Amazon for each size class. Purchases happen on Amazon under its terms; the site may earn an affiliate commission.
Are fit results guaranteed?
No: they are deterministic estimates from your inputs and published rules, with a 0.5 in margin built in. Your tape measure and the product's spec table make the final call.
Why show size classes instead of specific models?
Model specs and listings change weekly; dimension classes do not. Teaching the size that fits outlasts any specific link, and it keeps recommendations honest.