Accuracy
How accurate is the takeoff?
Our own benchmark, how we score it, and where it falls short. Benched October 2026.
92%
Doors counted
Across 14 plan sheets counted by hand, door by door. Score: 1 minus the total miscount over the true count, so a missed door and an extra one both count against it.
88%
Windows counted
The same 14 sheets. Windows are harder: a window in a wall reads much like a wall break, and elevations repeat them.
0
False scale warnings
On 637 pages of 29 real plan sets. Of the 72 pages with enough printed dimensions to judge, 68 matched their scale and 4 were flagged. All 4 were real: three half-size prints and a sheet of details at several scales.
How we measure
Scored the hard way
Counted by a person first
Each sheet's doors and windows were counted by hand before the software saw it. The software's count is compared to that, sheet by sheet; nothing is tuned to these sheets after the fact.
Every miss counts
We don't report the share of sheets that came out right, which hides big misses. We add up every door or window too many and too few, and divide by the true total.
The scale is checked against the drawing itself
Each feet-and-inches dimension printed on a sheet says what the scale must be. When most of them disagree with the sheet's scale, the takeoff says so and offers the one they agree with, before anything is measured.
What we don't claim
Where it falls short
- Counts are a starting point you review. Every one is shown on the plan, where you can drop it or add a missed one.
- Scanned and photographed plans, and metric sheets, are not judged by the scale check; it stays quiet rather than guess.
- Fourteen sheets is a small set. We will publish a larger one as it is counted, with the date.
- These are our numbers on our sheets. Try it on one of your own plans: that is the only figure that matters to you.
Want to know what faster takeoffs are worth to you? Work it out with your own numbers.
Try it on one of your own plans.
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