Photo measure

Simple, relative length/distance measurements in photo / image files, based on a known reference object size.
Estimate dimensions in a picture right in your browser (no software download, no data is uploaded to the server).
Technical drawings such as floor plans are ideal, because they contain a scale already.
However: No Warranty (please don't blame me if e.g. your kitchen furniture don't fit...)

Note that this method is only good for rough estimates in photos, due to camera perspective (and lens imperfections).
It's best if the reference object and whatever you want to measure are near each other and at the same distance from the camera when you take the picture.

Instructions:
  1. or drag&drop an image anywhere onto this page. The picture will be scaled to fit the page width.
  2. Create the reference dimension (red) by click-and-dragging the first measurement line onto an object with known size.
  3. Create measurement lines (green) by click-and-dragging (remove them by clicking on the 'remove' link in the measurement table below).
  4. Enter the real-world length of the first dimension as reference - the other measurements will be scaled accordingly.
Hints:
  • You can enter a unit, it'll show up in the results (it does not affect the measurements).
  • Leave empty if you want to measure pixels (pixel measurements will be off for scaled images).
  • Hold (or click to toggle) CTRL while dragging to "snap" horizontal/vertical lines
  • Press (or click) ESC to abort drawing the current line or clear all measurements. Hit it twice within 1 second to clear the image.
  • Hit (or click) DEL to remove the last measurement
Known dimension:
Filename:

Canvas not supported .. time to update your browserCTRLESCDEL
x=- y=- -
(or right-click on image to "Save Image As ...")

Measurements

Table:

No measurements yet.

CSV (tab as delimiter):

No measurements yet.