Calibrate photo scale and add mm dimensions
Import a photo or drawing underlay, set scale from one known length, then add the missing millimeter dimensions and callouts—in the image plane, for review and email.
How it works
Four steps from image or blank sheet to a shareable drawing.
- 01
Import
Paste or import a photo, screenshot, or drawing—from the clipboard or a file on your device.
- 02
Calibrate
Pick a known length on the image and enter its real size in millimeters.
- 03
Markup
Add the missing mm dimensions, callouts, and shapes on the image—in the image plane.
- 04
Share
Copy into email or chat for review, or print a page.
FAQ
Can I paste a photo, screenshot, or drawing?
Yes. Paste from the clipboard or import an image file—a photo, screenshot, or drawing underlay. 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 or drawing?
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, engineering profiles, and dimension lines in millimeters—on a blank sheet or over a screenshot. No install, no account.
- Draw with mm dimensions online
Add editable millimeter dimension lines to a blank-sheet sketch—on lines, shapes, or engineering profiles. Clearer than guessing pixels in Paint, lighter than opening CAD.
Ready to sketch?
Open the editor and start drawing right away—in your browser, on any device.
Questions, ideas, or something not working? FeedbackShare feedback