Measure Area
Area of any shape in an image
Runs in your browser. Files never leave your device.
How to use Measure Area
- Open an image.
- Trace the shape, or drag a rectangle or ellipse over it.
- Set a scale for real units, and copy the results or download the annotated image.
About this tool
Measure the area of any shape in an image: trace a polygon point by point, or drag a rectangle or ellipse. The area is calculated in real square units after you set a scale, and always in square pixels too.
- Works on your device. Nothing is uploaded.
- Free, with no sign-up and no watermark.
- No limits on file count or size beyond what your device can handle.
Questions and answers
How is the area of a traced shape calculated?
With the shoelace formula, which gives the exact area of the polygon through your points.
Can I measure the area of a room from a floor plan?
Yes. Draw the reference line along a wall or the scale bar with its known length, then trace the room.
Is Measure Area free?
Yes. Every tool on ImgImage is free to use, with no sign-up, no watermark and no limit on how many files you process.
Are my files uploaded anywhere?
No. Your files are processed by your own browser and never leave your device. Nothing you open here is sent to a server.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Large files are processed faster on a computer.