Jawline Check & Gonial Angle Calculator

Upload a side-profile photo to measure your gonial angle in degrees and classify your jawline type.

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Your Jawline (Gonial) Angle

The highlighted row marks your current jawline type band from manual point placement.

Angle Range (deg)Jawline Type
≤90
Blockish (Not Desired)

Very low mandibular angle. This bucket is treated as a non-desired/blockish profile zone.

91-114
Very Sharp

Very acute mandibular angle with a strong posterior-to-anterior jawline transition.

115-124
Sharp

Defined angle with clear contour separation near the gonial region.

125-134
Balanced

Middle-range angle often seen when jawline definition is present without extreme angularity.

135-145
Soft

Obtuser mandibular angle with smoother contour transition from ramus to chin.

146-170
Rounded

Broad, obtuse jawline angle with less abrupt angular definition in profile.

How Jawline Check Measures Angle

This tool measures the side-profile mandibular angle at gonion using three landmarks: one point along the posterior ramus line, the gonial corner, and a chin-edge point near menton. The interior angle between these two segments is used to classify jawline type.

The primary workflow is user-set geometry, so you can correct landmark placement directly. Auto-detect is optional and meant as a starting point.

Want a Sharper Jawline? Train it Daily.

Want a Sharper Jawline? Train it Daily.

You are already tracking your jawline angle here. Pair that progress with Jawliner and turn quick daily sessions into a stronger, more defined profile over time.

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FAQs

Common questions about jawline angle estimation, landmark placement, and result consistency.

What is the gonial angle in jawline analysis?
The gonial angle is the angle at the jaw corner where the posterior mandibular ramus meets the lower jaw body. In profile analysis, it is used as one visual marker of how sharp or rounded the jawline appears.
How does Jawline Check estimate my jawline type?
The tool uses three landmarks (ramus, gonion, and menton) to calculate the jaw angle, then maps that angle into practical jawline-type bands such as sharp, balanced, soft, or rounded.
Is manual point placement better than auto-detect?
Manual placement gives you direct control and is often best for difficult photos. Auto-detect is useful as a starting point, but refining landmark points manually usually improves consistency.
What photo setup gives the best jawline result?
  • Use a true side profile (around 90 degrees), not a three-quarter angle.
  • Keep head posture neutral without chin tuck or extension.
  • Use even lighting with minimal shadows across jaw contour.
  • Keep hair, beard bulk, and clothing away from the jawline edge.
How do I take better jawline photos?
  • Use a true side profile (about 90 degrees) instead of a three-quarter angle.
  • Keep your head neutral without chin tuck or neck extension.
  • Use even lighting; avoid deep shadows under the jaw border.
  • Pull hair, beard bulk, scarves, or collars away from the jawline edge.
  • Use normal camera distance to reduce perspective distortion.
Why does my jawline result change between photos?
Small changes in camera distance, lens perspective, head tilt, lighting, or landmark placement can shift angle output. For tracking, keep setup and point-placement method as consistent as possible.
Does beard density affect jawline angle detection?
Yes. Heavy beard bulk can obscure the true jaw border and influence where points are placed. Cleaner contour visibility generally improves angle reliability.
Can this tool diagnose skeletal or dental issues?
No. This is a non-medical visual analysis tool for appearance context. It does not replace clinical cephalometric assessment or evaluation by a qualified healthcare professional.
What are the limitations of this tool?

This is an appearance-based estimate from one photo and manual landmark placement. It is sensitive to camera perspective, occlusion, beard density, posture, and image quality.

It does not replace clinical cephalometric assessment or medical evaluation.

What does the landmark overlay mean?

The overlay dots represent user-controlled landmarks. Dashed lines indicate the posterior mandibular segment and mandibular body segment used to estimate the angle.

Small point shifts can materially change angle output. Zoom in visually, place points carefully, and keep your method consistent if you are tracking over time.

References

  • Upadhyay RB, Upadhyay J, Agrawal P, Rao NN. Analysis of gonial angle in relation to age, gender and dentition status by radiological and anthropometric methods.PubMed record
  • Sforza C, Grandi G, Catti F, et al. Age- and sex-related changes in three-dimensional facial morphology.PubMed record
  • Farkas LG, Katic MJ, Forrest CR. International anthropometric study of facial morphology in various ethnic groups/races.PubMed record
  • Kazemi V, Sullivan J. One millisecond face alignment with an ensemble of regression trees.arXiv paper

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