Calibrate photo scale and add mm dimensions
Import a field or site photo, set scale from one known measurement, then place dimension lines in millimeters—in the photo plane, for field notes and email.
What you get
EngSketch in the browser—for quick technical communication, not formal document review.
- Import or paste a flat photo—no app install
- Calibrate scale from one known length on the image
- Add mm dimension lines in the 2D image plane—not depth or 3D
How it works
Three steps from image or blank sheet to a shareable drawing.
- 01
Import
Paste a photo from the clipboard or import an image file from your device.
- 02
Calibrate
Pick a known length on the photo and enter its real size in millimeters.
- 03
Dimension
Place dimension lines on the image—distances in mm, in the photo plane.
FAQ
Can I paste a screenshot?
Yes. Paste from the clipboard or import an image file. Clipboard paste support may vary by mobile browser.
Can I measure depth or 3D distances from a photo?
No. EngSketch works on a flat image. You calibrate scale from one known length, then dimension in the image plane. It is not AR measurement or photogrammetry.
How accurate are dimensions on a photo?
Accurate enough for explanations and field notes when the subject is roughly in one plane—not for manufacturing drawings, survey, or objects at very different depths.
Related
- Technical sketch tool in your browser
Draw lines, rectangles, and dimension lines in millimeters—on a blank sheet or over a screenshot. No install, no account.
- Draw with mm dimensions online
Add editable dimension lines in millimeters to a sketch or marked-up image—lighter than opening CAD, clearer than guessing pixels in Paint.
Ready to sketch?
Open the editor—sketch from scratch or mark up a screenshot—in minutes.
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