Home › Resources › Take-off from a PDF
How to do a quantity take-off from a PDF drawing.
Updated 6 October 2026 · 3 min read
Most drawings arrive as PDFs. You can measure straight from them, without printing or redrawing, if you set up the file properly. This guide gives the steps and a worked example.
Step 1: check the file
- Revision. Read the title block and confirm it is the latest issue.
- Type. A vector PDF (exported from CAD) stays sharp when you zoom. A scanned PDF is a picture, so lines are less exact.
- Page size and rotation. A sheet may be A1 or A0 and rotated. Note which, because it affects the scale.
- One sheet, many views. A plan, a section and a detail may sit on the same page at different scales.
Step 2: set the scale and verify it
Find a dimension printed on the drawing, such as a grid spacing or a door width. Measure that line, enter its real length, then check the result against a second dimension. If the two disagree, stop and find out why. See how to set the scale on a drawing.
Step 3: plan the order
- Work level by level, from the lowest floor up.
- Within a level, measure counts first (doors, windows, fixtures), then lengths (walls, skirting), then areas (floors, ceilings).
- Keep each trade separate so that it can be priced and checked on its own.
Worked example: one room
A room is 5.0 m × 4.0 m with a 2.7 m ceiling, one door 0.9 × 2.1 m and one window 1.2 × 1.2 m.
| Item | Working | Result |
|---|---|---|
| Floor area | 5.0 × 4.0 | 20.0 m² |
| Perimeter | 2 × (5.0 + 4.0) | 18.0 m |
| Skirting | 18.0 − 0.9 door width | 17.1 m |
| Gross wall area | 18.0 × 2.7 | 48.60 m² |
| Openings | 0.9 × 2.1 + 1.2 × 1.2 | 3.33 m² |
| Net wall area (paint or plaster) | 48.60 − 3.33 | 45.27 m² |
The same net wall area feeds plaster, paint and, for blockwork, the block count. Measure it once and reuse it.
Step 4: check before you price
- Does the total floor area match the area stated on the drawing or in the brief?
- Are openings deducted once, not twice?
- Are the same rooms counted on only one sheet?
- Does the total look sensible against a similar past project?
Common mistakes
| Mistake | Effect | Prevention |
|---|---|---|
| Trusting the title-block scale on a "fit to page" print | All quantities wrong by the same factor | Measure a printed dimension |
| Measuring from an old revision | Pricing work that has changed | Check the revision before starting |
| Forgetting a scale change between views | One view wrong, others right | Set scale for each view |
| Measuring a scanned plan at low zoom | Small errors that add up | Zoom in and click on exact corners |
From measurements to a bill
When the quantities are checked, they go into a bill of quantities, where rates and overhead and profit turn them into a price. TapeLine is built for this workflow on PDF and CAD drawings.
Guides by TapeLine, quantity take-off software from Natha & Co, founded by Natha Mohamed M.M.
Try Free Beta VersionSee the 3D take-off
Keep reading
How to set the scale on a drawing
What 1:50 and 1:100 mean, how to set scale from a known dimension, the pitfalls of printed PDFs, and ISO paper sizes.
2 min readBasicsWhat is quantity take-off?
Quantity take-off is measuring the materials and work shown on drawings so they can be priced. The basics, the three kinds of measurement and where software helps.
3 min readBasicsQuantity take-off checklist for a building
A take-off order from substructure to services, with the unit for each item and the habits that keep quantities right.
2 min read