Engineers & architects
Review dimensions on plans
Set the drawing scale and measure a known distance before checking other lengths or areas.
Your document. Your device.
Measure PDF.
From a drawing to dimensions you can share.
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Continue from a saved .i2pdf project.
Find & Act
Find selectable text in the original PDF. Review the matches, then highlight or mark them. Added elements are not searched.
Only the first matches are shown because this search reached the limit. Use a more specific phrase to check further matches.
This adds redaction marks. Start removes the marked content from the downloaded PDF. Check the marks first; search cannot find text in images.
Choose a tool, then work on the page. Use Pan to scroll a zoomed view.
100%
Your PDF is ready
Download your new copy, or go back to adjust your additions. Your original file is unchanged.
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Your file stays on your device. Nothing is uploaded.
PDF
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Three steps to your finished PDF
- 01
Open your PDF
Choose a PDF from your device or try the sample.
- 02
Set the scale and measure
Set a drawing length and its real-world equivalent, such as 1 inch = 10 feet. Drag a distance, rectangle or ellipse; tap points for a perimeter or polygon and choose Finish. Close path includes the final segment back to the start. Select a measurement to adjust its scale, precision, color or comment; Apply scale to all updates existing measurements.
- 03
Save your copy
Save the edited PDF, review it and download it. Go back to revise at any time in this session.
Measure PDF Online – Distance, Perimeter and Area
Measure PDF provides distance, perimeter and area tools for plans, diagrams and technical drawings. Set a drawing scale, trace a line or boundary, and read the result directly on the page. Measure rectangular, circular or elliptical areas, or outline an irregular area with a polygon. Lengths follow the chosen scale and areas use its square, with square units shown in each area label. Measurements are based on PDF page geometry rather than screen pixels, so zoom does not change the result. Save the labels and optional comments as PDF annotations without uploading your drawing.
QUICK VIDEO TUTORIAL
How to measure distances and areas in a PDF
Set the scale before taking a measurement.
English narration
Watch the video
Practical ways to use this tool
Designers
Trace irregular boundaries
Use polygon measurements for an irregular footprint, or choose rectangular, circular and elliptical areas.
Educators
Explain a geometric result
Save measurements with labels and comments so others can see which points or boundaries you used.
Features and controls
Set the scale and measure
Measure distance, perimeter, rectangle area, round area and polygonal area in PDF. Set the drawing scale and save labeled measurement annotations.
How this works
Set a drawing length and its real-world equivalent, such as 1 inch = 10 feet. Drag a distance, rectangle or ellipse; tap points for a perimeter or polygon and choose Finish. Close path includes the final segment back to the start. Select a measurement to adjust its scale, precision, color or comment; Apply scale to all updates existing measurements.
Place and revise additions
Move and resize selected additions, then inspect each affected page.
Placement and review
Use the selection tool after placing an element to adjust its position and appearance. Zoom in for small details and use Fit to check the full page. Undo and redo help revise accidental changes before generating the download. Preview the exported PDF in a reader that supports the annotations you use.
What your download contains
Understand what the saved PDF contains.
How this works
Measurement labels and comments are saved as visible PDF annotations. Accuracy depends on the drawing scale, document geometry and points you choose; verify against a known dimension. Scanned or stretched plans may not have a consistent scale. Saved labels do not automatically recalculate when edited in another PDF reader.
Review your finished PDF
Preview the result before downloading and sharing it.
Preview, download and revise
Select Start when the settings are ready. On the result screen, Preview opens the generated PDF and Download saves a separate copy. Back returns to the current workspace; Start over clears it for a new file. Review small text, page edges and page order in the finished copy. A new PDF does not preserve the validity of an existing digital signature.
Supported files & processing
- Input
- Output
Open one PDF up to 300 MB and 750 source pages. Protected files need an unlocked copy unless this tool explicitly offers password entry. Large or complex pages can require more memory or reach processing limits even when the file is within these limits.
Processing takes place on your device without uploading the document. Download your result before closing the page; keep the original separately.
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FAQ
Good to know.
How this tool works and what happens when you save.
On your deviceCan I use this as a PDF measuring tool for construction plans?
Yes, for reviewing distances and areas at a known drawing scale. Check a labeled dimension first and verify the selected points. Results depend on the source plan and are not certified survey measurements.
How do I measure using the drawing's scale?
Set a drawing length and its real-world equivalent, such as 1 inch = 10 feet. Drag a distance, rectangle or ellipse; tap points for a perimeter or polygon and choose Finish. Close path includes the final segment back to the start. Select a measurement to adjust its scale, precision, color or comment; Apply scale to all updates existing measurements.
Does the tool know the real-world scale automatically?
No. Set the drawing scale using a known distance before measuring. Accuracy depends on that scale, document geometry and the points you choose; a stretched scan may not have a uniform scale. Measurement labels and comments export as PDF annotations, and do not automatically recalculate in another reader.
What are the file and page limits?
Open one PDF up to 300 MB and 750 source pages. Protected files need an unlocked copy unless this tool explicitly offers password entry. Large or complex pages can require more memory or reach processing limits even when the file is within these limits.
Are my files uploaded for this tool?
Document processing and PDF generation run in your browser on your device. This tool does not upload the document for processing. Save your result before closing or reloading the page; the original file on your device is unchanged.
