Source: https://restorebunny.com/tools/photo-measurement-ruler/

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# Photo Measurement Ruler

Calibrate a visible reference length, then measure another line on the same plane. Download the marked image and a measurement report.

Free · No signupFiles stay on your device

**Choose an image**Up to 4 MP / 20 MB per image

Reference lengthUse inches (otherwise cm)

**Give an old photo a fresh start**

Repair fading and scan damage with RestoreBunny’s AI photo restoration.

[Restore a photo](<https://restorebunny.com/signup/?from=seo-content&source=%2Ftools%2Fphoto-measurement-ruler%2F>)

## How to use photo measurement ruler

1. Choose your local image and the task-specific settings below.
2. Create the result and inspect its details.
3. Download your file without creating an account.

## A practical example

A 100-pixel reference representing 10 cm gives 0.1 cm per pixel. A 250-pixel measured line then reports 25 cm.

## Frequently asked questions

Are my files uploaded?

No. This utility runs in your browser. Your photos and settings are not sent for processing.

What should I check before using the output?

Accuracy depends on reference selection, scale and perspective. This is a visual estimate, not surveying or safety-critical measurement.

## Keep working on your photo

- [All free image tools](<https://restorebunny.com/tools/>)
- [Prepare image dimensions](<https://restorebunny.com/tools/image-resize/>)

[Browse all free tools](<https://restorebunny.com/tools/>)

By RestoreBunny · Reviewed 2026-10-25. Utilities use local calculations or [browser image processing](<https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Pixel_manipulation_with_canvas>). The download button identifies the output format. Animated images export one decoded frame. Keep your original files.