fWHR Calculator

How to Use fWHR Calculator

The fWHR Calculator calculates facial width-to-height ratio from either manual measurements or image-assisted point marking. In manual mode, enter the bizygomatic width, upper face height, and unit. The unit can be millimeters, centimeters, inches, or pixels, as long as both measurements use the same unit. In image mode, upload a local photo and click four points: left cheekbone, right cheekbone, upper face top point, and upper face lower point.

The result area shows the fWHR value, the calculation process, the width and height used, and a neutral range label. The range labels are deliberately plain: lower ratio, average range, or higher ratio. They describe geometry only and do not rank faces or make claims about attractiveness, behavior, intelligence, leadership, aggression, or health.

For best results, use a front-facing image with minimal lens distortion, a neutral expression, and a level head position. Avoid wide-angle selfies, angled faces, strong perspective distortion, and unclear landmarks. Small differences in where points are placed can change the final number.

Formula & Theory - fWHR Calculator

The fWHR Calculator uses the standard ratio:

fWHR = bizygomatic width / upper face height

Where:

bizygomatic width = distance between the left and right widest cheekbone points
upper face height = vertical distance between the selected upper and lower upper-face landmarks

In manual mode, the values are taken directly from the inputs:

fWHR = face width input / upper face height input

In image-assisted mode, the calculator measures pixel distance between the clicked points:

width in pixels = distance(point 1, point 2)
height in pixels = distance(point 3, point 4)
fWHR = width in pixels / height in pixels

Because the unit cancels out, a ratio measured in pixels can be compared with the same landmark definition measured in millimeters. However, different landmark definitions, posture, facial expression, camera angle, and lens distortion can make two measurements different even for the same person.

Use Cases for fWHR Calculator

The fWHR Calculator is useful for educational measurement practice, anatomy class demonstrations, image annotation exercises, and checking how ratios change under different photo conditions. It can also help users understand why research measurements need clear landmark definitions and consistent imaging standards.

This tool intentionally avoids appearance scoring and personality interpretation. fWHR is only a facial width-to-height ratio. It should not be used for medical diagnosis, identity recognition, attractiveness evaluation, social judgment, hiring, screening, or any decision about a person.