Jaw Frontal Angle: What FaceIQ Labs Measures and How

Key facts

• Formula: 180° minus the angle between the two gonion-to-chin-border directions
• Measured from the front-view photo; it is not the side-profile gonial angle
• Lower value: more steeply descending jaw borders in this construction
• Higher value: flatter lower-jaw borders in this construction
• Describes lower-face taper rather than jaw width alone
• A change in chin width or the height of the jaw corners can change the direction of the jaw borders and the angle
• Worked example: a 90° angle between the jaw-border segments gives a reported value of 90°; example values are not target ranges
• FaceIQ Labs calls it a FaceIQ landmark-based adaptation; the linked Farkas et al. (2005) research has not directly validated this formula or its score
• FaceIQ Labs' Harmony analysis compares 70+ facial ratios and angles to ideal ranges adjusted for gender and ethnicity
• Harmony is weighted roughly 60% from the front photo and 40% from the side photo

What is the Jaw Frontal Angle in FaceIQ Labs' Harmony analysis?

Jaw Frontal Angle is a FaceIQ Labs Harmony measurement taken from the front-view photo. It describes the angle relationship between the left and right lower jaw borders, showing how the lower face tapers toward the chin. FaceIQ Labs' Harmony analysis compares 70+ facial ratios and angles, and this is one of them.

How does FaceIQ Labs calculate Jaw Frontal Angle?

FaceIQ Labs calculates Jaw Frontal Angle as 180° minus the angle between the two gonion-to-chin-border directions, using the front-view photo. The guide's diagram extends the left and right jaw borders until they intersect to show the construction, so the reported value is the supplementary angle of that intersection angle.

What do lower and higher Jaw Frontal Angle values mean?

In FaceIQ Labs' Jaw Frontal Angle construction, a lower value means more steeply descending jaw borders and a higher value means flatter lower-jaw borders. The measure describes lower-face taper rather than jaw width alone, so a change in chin width or in the height of the jaw corners can change the angle.

What is an example calculation for Jaw Frontal Angle?

If the angle between the two directed jaw-border segments is 90°, FaceIQ Labs' Jaw Frontal Angle is also 90°, because 180° minus 90° equals 90°. FaceIQ Labs states that example values only explain the calculation: they are not a target range and are not measurements of the guide's schematic.

Is Jaw Frontal Angle the same as the side-profile gonial angle?

No. FaceIQ Labs' Jaw Frontal Angle is a frontal construction measured from the front-view photo, not the side-profile gonial angle. The Help Center lists Gonial Angle as its own separate Harmony guide, and the Jaw Frontal Angle diagram extends the jaw borders to show their intersection.

Has research validated FaceIQ Labs' Jaw Frontal Angle formula?

No. FaceIQ Labs describes Jaw Frontal Angle as a FaceIQ landmark-based description of facial shape. The linked research, Farkas et al. (2005), 'International anthropometric study of facial morphology in various ethnic groups/races', documents variation in facial dimensions across sampled populations. It has not directly validated this formula or its score, and descriptive measurements do not establish an attractiveness score. FaceIQ Labs says its score weights and reference ranges are model settings.

Does FaceIQ Labs publish an ideal range for Jaw Frontal Angle?

Not on this guide. FaceIQ Labs' Jaw Frontal Angle guide gives no target numbers, and the company says its score weights and reference ranges are model settings. Its Harmony analysis compares 70+ ratios and angles to ideal ranges adjusted for gender and ethnicity, but the range applied to a user is not listed here.

Which other FaceIQ Labs guides cover the jaw and lower face?

FaceIQ Labs' Help Center groups these guides with Jaw Frontal Angle in the Harmony section's jaw region. Related guides also include Midface–Jaw Angle Difference and a separate Gonial Angle guide for the side-profile jaw angle.

• Jaw Slope
• Bigonial Width
• Lower Third Proportion
• Midface–Jaw Angle Difference
• Gonial Angle (side-profile jaw angle)

Frequently asked questions

Is Jaw Frontal Angle measured from the front or side photo?

Jaw Frontal Angle is measured from the front-view photo. FaceIQ Labs distinguishes it from the side-profile gonial angle, which is a separate measurement.

Does a lower Jaw Frontal Angle mean a better score?

FaceIQ Labs describes a lower value as more steeply descending jaw borders and a higher value as flatter lower-jaw borders, but its guide does not state which direction scores better or give a target range.

What landmarks does Jaw Frontal Angle use?

It uses the gonion and the chin border on each side of the face. The two gonion-to-chin-border directions form an angle, and the reported value is 180° minus that angle.

Is Jaw Frontal Angle just a measure of jaw width?

No. FaceIQ Labs says it describes lower-face taper rather than jaw width alone. Changes in chin width or in the height of the jaw corners can change the direction of the jaw borders and therefore the angle.