How a digital takeoff works
- Open the plan sheets in takeoff software. The sheets are usually PDF files.
- Set the scale for each sheet. Check it against a known dimension, such as a door width.
- Create an item for each thing you count or measure.
- Click each counted item. Trace each length and each area.
- Review the totals and export the list.
Digital and paper compared
- Paper uses a scale ruler, highlighters and a tally sheet. Digital uses clicks on a screen.
- On paper you add the totals. In software the totals add themselves.
- Digital markups stay on the sheet. Another estimator can open the file and check your work.
- When an addendum replaces a sheet, you load the new sheet and recount only what changed.
What stays the same
The estimator still reads the specification. The estimator still decides what is in scope. The software measures what you point at. It does not know what a wall type legend means unless you read the legend.
Common mistakes
- The wrong scale on an enlarged plan or a detail.
- Measuring a sheet that is marked not to scale.
- Counting an item twice, once on the floor plan and once on the enlarged plan.
- Missing a schedule that changes the count, such as a door schedule or a fixture schedule.
Digital takeoff and AI takeoff
They are not the same thing. In a digital takeoff a person makes every click. In an AI takeoff the software proposes the quantities and a person reviews them. Both produce a quantity list. Neither one removes the need to read the spec.
AI and takeoff software · Updated 11 Nov 2026