To use the calculator:

1. Input the actual marker size (for instance, 25mm).

2. Input the measured marker size from the x-ray image.

3. Click on "Calculate Magnification" to get the magnification factor and percentage.

In this calculator:

1. Users will input the magnified measurement they obtained from the X-ray.

2. Users will also input the magnification percentage they previously calculated (e.g., 10 for 10% magnification).

3. Clicking the "Calculate Original Measurement" button will provide the estimated original measurement before magnification.