Tool 16
Scale PDF
Zoom to a known dimension, select its endpoints, then enter the real measurement.
Tool 16
Scale PDF
Calibrate plan drawings and measure distances and areas directly on PDF pages.
Measurement canvas
Calibrate and measure
Scale not setChoose Set scale, then select both endpoints of a known dimension.
Choose a plan PDF to start measuring.
Measurement disclaimer
Measurements depend on the scale you set and the accuracy of the source drawing. Check important dimensions against the original plan. PDFAdjust measurements are not certified survey or construction measurements.
About this tool
When to use it
Measure a plan when a known dimension is marked on the drawing. Zoom in, select both ends of that reference and enter its real length to calibrate the page.
What you get
After calibration, draw distance or area measurements on the plan and export a marked PDF or measurement data for review.
Before sharing
Confirm the reference length and units before relying on any result. Scanned or resized drawings may not be uniformly to scale; these measurements are not certified survey values.
Private processing
Thumbnails and edits are created in the browser. Documents are not uploaded to PDFAdjust.