Measurements
Setting Drawing Scale
Scale calibration is required before distance, area, perimeter, and volume markups can report real project units instead of page pixels.
Updated 2026-06-12 · 5 min read
12.40 m
Use a known dimension on the page, then enter the real value and unit.
Calibrate with a known length
- 1
Open the drawing
Choose the PDF page that contains a reliable labelled dimension or scale bar.
- 2
Select Set Scale
Use Set Scale from the document tool group or toolbar shortcut.
- 3
Pick endpoints
Click the two endpoints of the known distance as accurately as possible.
- 4
Enter the real length
Enter the printed real-world value and unit, then save the calibration.
Check the result
- 1
Measure a second known dimension
Use Distance on another labelled item to confirm the calibration.
- 2
Recalibrate if needed
If the check value is wrong, repeat calibration using a longer, clearer known dimension.
Related topics
Related product guides
These broader guides explain how this support workflow fits ContractorCounter's markup, measurement, takeoff, and export toolset.