Drop a photo here or use “Open image” above. It never leaves your device.
1. Draw a red SCALE line over a known distance to calibrate.2. Draw other lines over objects - the system will calculate lengths.
How to use
Draw a red SCALE line over a known distance to calibrate.
Draw other lines over objects - the system will calculate lengths.
Type the scale line's real length in the “Scale & Units” box.
Select an element and press DEL if you want to remove it.
Double-click a text to edit it right on the image. Drag the round handle above a selected object to rotate it (hold Shift for 15° steps).
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Use Area mode to draw a closed shape and calculate surface area.
Use Angle mode on two connected lines to measure the angle between them.
Save or load a project as JSON to continue your measurements later.
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Desktop: Left click to draw. Space + Drag (or Right Click) to pan.
V Select · H Move view (drag) · L Line · T Add text · Ctrl/⌘ Z Undo · Ctrl/⌘ D Duplicate · Del Delete element
Hold Shift while drawing or dragging an end point to keep a line horizontal or vertical.
Mobile: One finger to draw. Two fingers to pan and zoom simultaneously.
Restore your previous work?
What's new
Copy and paste objects with Ctrl/⌘ + C and V, or duplicate the selected one with Ctrl/⌘ + D or the new Duplicate button.
New magnifier: while you draw or drag a point, a round loupe with crosshairs shows exactly where it lands. It is on by default; the magnifier button next to snapping turns it off.
Order now also moves an object one layer up or down, past the next object it overlaps.
New Order buttons bring the selected object to the front or send it to the back, so overlapping lines, texts and areas stay readable.
Angles now follow their two lines and disappear when those lines are separated or deleted.
Rotate lines, texts, areas and angles with the round handle above the selected object; hold Shift for 15° steps.
Texts are now typed and edited right on the image, at their real size and place.
Areas can now be moved by dragging them and reshaped by dragging their corners.
Better snapping: lines and points snap to line ends, midpoints, area corners, image edges and other lines, also when you drag a whole line. A marker shows the target, the magnet button turns snapping off, and holding Alt (Option on Mac) pauses it.
Select a line, area, angle or text and change its color, thickness, label size, ends or style right from the toolbar — no need to draw it again.
Lines, texts, areas and angles now get the same thickness and size whatever zoom level you draw them at, sized to the image.
Dashed and dotted lines, and a “Dashed segment” tool that dashes only the part of a line running behind an object. Thanks to Dwayne for the idea!
Type an exact length in the measurements table: the line keeps its start point and direction.
Hold Shift to keep a line horizontal or vertical while drawing or dragging.
New Tools group with a scale-line tool, a measure-line tool that takes over after the first line, and the select and hand tools. Holding Space now lights up the hand tool.
New “Report a problem” form, so you can tell us about bugs right from the tool.
New select tool: click to pick and move objects without drawing new lines. The selected object’s value is shown in the corner.
New hand tool: drag the view with one finger or the left mouse button.
Lines, areas and angles now stay readable on large photos and in exports.
Images over 60 megapixels now get a link to a free image resizer.
Add Text now works on large photos, in fullscreen and on touch screens, and a double-click edits a text. Thanks to Dwayne for reporting the problem!
52 new languages, including Brazilian Portuguese and Traditional Chinese (96 in total), and a searchable language list.
The toolbar is no longer cut off on wide screens.
Blog guides are now available in every language.
New fullscreen mode for distraction-free measuring.
Your last work is kept in the browser and can be restored after reloading the page.
Faster drawing on large images and better keyboard and screen-reader support.
Area and angle measurement, a measurement table with CSV export, and saving projects as JSON.
MeasureOnImage.com is a free, browser-based tool that lets you measure distances and dimensions directly on any image — floor plans, blueprints, maps, technical drawings, or everyday photos. No installation, no upload to our servers. Everything runs in your browser for complete privacy.
How It Works
1. Upload your image
Click "Upload Image" or drag and drop any photo, blueprint, floor plan, or map onto the canvas. Supported formats: JPG, PNG, PDF (first page).
2. Draw the scale line
Draw a red SCALE line over a reference object with a known real-world measurement — for example, a door (2 m), a table (1.5 m), or a ruler. Enter the known value and unit.
3. Measure anything
Draw additional lines over any object you want to measure. The tool automatically calculates the real-world length based on your scale.
4. Export your work
Download the annotated image as PNG or JPG, or export as PDF for reports and documentation.
Common Use Cases
Floor plan measurement — estimate room dimensions from real estate or architect drawings.
Blueprint scaling — verify dimensions on construction or engineering drawings.
Map distance measurement — calculate real-world distances on maps with a known scale.
Furniture planning — measure furniture and spaces from photos to plan room layouts.
Land plot analysis — measure plot areas from satellite or cadastral map images.
Frequently Asked Questions
Is MeasureOnImage.com free to use?
Yes, the tool is completely free. No account or registration is required.
Is my image uploaded to your server?
No. Your image is processed entirely in your browser. It never leaves your device.
What types of images can I measure?
You can measure on any image: floor plans, architectural blueprints, maps, construction drawings, product photos, land plots, and more.
How accurate are the measurements?
Accuracy depends on the quality of your scale reference. If you set the scale using a known object (e.g. a door frame), measurements will be proportionally accurate across the image.
Can I use this tool on mobile?
Yes. The tool is fully responsive. Use one finger to draw lines and two fingers to pan and zoom on mobile.
What units can I use?
You can use any unit you like — metres, centimetres, millimetres, inches, feet, or any custom label.
Can I save my measurements and continue later?
Currently the tool works within a single session. You can export the annotated image as PNG, JPG, or PDF to preserve your work.
