Guides
How accurate is automated countertop takeoff?
When the piece layout is known, Counterly's measurement rules can be checked against a shop's own takeoff, and the table below shows the result for the one project where we hold both the layout and the answer key, agreeing at the quote's own rounding. That checks the measurement, not the reading: reading a plan set automatically adds error of its own, which is why every takeoff is a first pass an estimator confirms, and why our misses are published below.
Measurement scorecard
| Project | Scope | Types checked | Result |
|---|---|---|---|
| 64-unit multifamily | Kitchens | 3 of 3 | Square footage and linear footage agreed with the shop's issued quote for every type, measured from the supplied piece layout. Agreement is at the quote's own rounding (to the nearest 0.1 SF and 0.1 LF), not to the unrounded figures. Scope caveat. Not a completeness check: on type 3A-3B the layout also shows a removable island that the quote leaves out. That scope question is open with the shop, so this row compares only the pieces the quote includes. |
Each row compares our measurement with the shop's own numbers for the pieces the quote includes; it does not check that the quote covers everything on the drawing. It is not yet an end-to-end test of the automated read, from uploaded PDF to finished takeoff; we will publish that separately once it exists. The misses below belong to the same record.
Customer layouts vs fabrication drawings
Reading a customer's kitchen layout is a harder problem than reading a fabrication drawing. A fabrication drawing is already dimensioned by an estimator. A customer layout has to be interpreted.
The row above was checked against a shop-issued quote, measuring from a supplied piece layout. It tests the measurement rules, not the reading of a customer layout, which is the harder problem and the one an estimator still confirms.
Per-type match vs aggregate total
Every row above is a per-type match; we do not list projects we could only check as a single total.
Published misses
These were reported from earlier runs on production jobs. Each one is a single type or a single slab count, and none is reproduced by the current benchmark; they are published as what went wrong, not as measured rates.
Off by 24% on one kitchen type.The run along one wall was a seated peninsula at 38" deep; it had been treated as a standard 26" base run. One wrong depth on one run moved the type by a quarter. This is why depth is read per run.
Over by 51% on another type in the same job.The layout showed a removable island the issued quote didn't include. The takeoff wasn't wrong about the drawing — the drawing and the quote disagreed, which is a question for the estimator, not something to resolve silently either way.
Inconsistent range treatment. On one type a slide-in range broke the run; on another the full back wall was quoted through it. Both appear in real production quotes. The convention has to be set per shop, not assumed.
First-pass nesting ran 20% conservative.An early slab count came in well above what the shop actually planned to buy, because identical L-shaped pieces weren't being interlocked. Nesting yield on repeating unit types is where the slab count is won or lost.
Disclosure
Automated takeoff is a first pass an estimator confirms, not a replacement for judgment.
From the shop floor
We publish what estimators tell us about these pages, including the parts where the software was wrong. If you run takeoff in a shop and this page got something right — or got it wrong — send it to us and it goes here with your name on it, or without it if you prefer.
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