Jawline Test
AI measures your gonial angle in degrees and scores your jawline definition. See exactly where you stand — and what to do about it.
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Your Jawline Score
Upload a front-facing photo to get your score
Measure your jawline angle in 60 seconds
Here is our 60-second jawline angle explainer as straight text — no fluff, no dodge:
What is your jawline angle? And is it really bone?
From a front photo, it's the slope from the corner of your jaw down to your chin.
Quick correction. The true gonial angle is measured from the side. A front photo reads slope. A commonly cited range, not a law.
Push your chin forward and the same jaw reads sharper. That's posture and camera, not bone.
Is it fixable? Partly. Bone sets the frame. Body fat, masseter muscle, and posture genuinely move how sharp it looks.
Lens a touch above eye level, chin forward and down. That changes the photo, not your bone.
See how your jawline measures. One of seventeen measurements, free, at realsmile.online.
Jawline score ranges — what your angle means
Sharp, defined jawline angle in the top ~10% of the population. Associated with strong masculine facial structure and the highest attractiveness ratings for jaw definition. Typical of fitness models and professional athletes at low body fat.
Clearly defined jaw angle that reads as sharp and masculine. Still well above average and rates highly in attractiveness research. Achievable for most people at 13-16% body fat.
The most common range. A functional jawline that doesn't read as either sharp or soft. Typical for men at 17-22% body fat. Moving to the above-average range is achievable through fat loss for most people.
Softer jaw angle that creates a rounder facial profile. Often caused by facial fat accumulation over the jaw. Typically the first range where fat loss produces immediately visible jaw improvement.
Very soft jaw profile. Usually a combination of high body fat and underlying bone structure. Significant fat loss (to 13% or below) typically improves the apparent angle substantially even if the bone angle is wider.
Women's ideal gonial angle range is 125-135° — slightly wider than men's optimal range due to differences in desired facial structure perception.
What does your gonial angle look like?
Use these reference profiles to calibrate your reading. Each silhouette shows where the gonial angle vertex sits and how it reads at the named degree.
Defined gonial angle
Population median
Softer gonial angle
Your actual angle is measured from your uploaded photo using the bigonial line and the mandibular ramus. Most adult males fall 115°–125°; the “sharp” end of that range reads as more masculine in perception studies (Geniole 2015, PMID 26181579).
Schematic silhouettes — not real measurements. Actual gonial-angle math runs on your photo, not on these references.
Same face, two scores — why retaking matters
The same person can read 17° apart depending on lighting, head tilt, and framing. Your bone structure doesn't change between photos — but the angle the camera captures does. Most jaw-score tools hide this. We don't.
What went wrong
- •Overhead lighting flattens the shadow under the jaw, hiding the angle's real corner.
- •~12° chin-up tilt rotates the mandible out of profile — the angle widens on camera even though bone is unchanged.
- •Tight crop cuts the ear out of frame — landmark detection loses its anchor for the ramus axis.
What was fixed
- •45° front-side lighting casts a clean shadow under the jaw — the angle's real corner becomes visible to the model.
- •Chin parallel to the ground — neutral head pose puts the mandible in true profile, no rotation distortion.
- •Full ear in frame gives the ramus axis its landmark anchor — gonial-angle math now uses correct reference points.
The 17° swing is real — and it's not your bone
Both silhouettes show the same underlying mandible. Gonial-angle measurements from photographs vary with head pose, lighting direction, and framing — Sforza 2017 reported significant inter-photo variance even in controlled studies. A 5–10° swing from photo conditions alone is normal; a 15–20° swing under poor conditions is documented.
Your bone structure doesn't change. Your photo does. Retake with these conditions and re-score.
Schematic reference — your actual gonial angle is computed from your photo's landmarks, not these illustrations.
How AI measures your jawline
Jawline measurement uses landmark detection — identifying precise coordinates of 68 facial points, then computing angles from the mandibular boundary landmarks. The primary metric is the gonial angle. Here's the process:
Landmark detection
The AI identifies the mandibular outline — the visible edge of the jawbone from chin point through the jaw angle to where it meets the ear. On a front-facing photo, this traces the lower jaw shape.
Gonial angle calculation
The gonial angle is the angle at the "corner" of the jaw — where the vertical ramus meets the horizontal body of the mandible. AI computes this as the angle between the ramus line and mandibular line extended.
Definition scoring
Beyond the angle, the AI scores jawline definition by measuring contrast along the jaw border — how sharply the jaw boundary transitions from face to neck. High definition = visible, sharp jaw edge. Low definition = blended, soft transition.
Percentile ranking
Your angle and definition scores are ranked against population distributions from thousands of measurements to give you a percentile. 80th percentile means your jawline is more defined than 80% of measurements.
Photo angle vs clinical gonial angle
One honest caveat: a front-facing photo cannot see bone, so the 2D angle the scan scores is not the clinical gonial angle from a cephalometric X-ray. From the 68 landmarks, the scan measures the angle formed at the chin point between lines to the mid-jaw landmark on each side, averaged across both sides — the full-credit band is 44–54° for male scoring and 50–62° for female. It also computes jaw taper: jaw width at mid-jaw divided by cheekbone width (male band 0.72–0.85, female 0.62–0.75). The 128–142° range you see in orthodontic literature is the related X-ray measure — useful context, but the two numbers are not directly comparable.
Research on jawline and attractiveness
The jawline is the single most common below-average metric in our looksmaxxing test data — and one of the most studied in facial aesthetics research. A 2017 study by Sforza and colleagues measuring gonial angles in attractiveness-rated face sets found that men rated in the top quartile for attractiveness had average gonial angles of 127°, versus 142° for men rated in the bottom quartile. The 15° difference is substantial and overlaps significantly with the range improvable through fat loss.
Research by Penton-Voak and colleagues on cross-cultural facial attractiveness found that jawline definition was one of the most cross-culturally consistent attractiveness predictors for male faces — robust across Western, East Asian, and African populations. Unlike some facial preferences that vary by culture, the preference for defined jaw structure is consistent globally.
A 2019 study specifically examining the role of masseter muscle development in jaw aesthetics found that individuals who had performed regular jaw exercise (including competitive gum chewing as a sport in some cultures) had significantly lower gonial angles and higher attractiveness ratings than age-matched controls, controlling for body fat. This provides direct evidence for the mastic gum approach.
127° vs 142°
Average gonial angle — top vs bottom attractiveness quartile (Sforza 2017)
~70%
Of looksmaxxing test users score below average on jawline angle
5–7°
Average jawline improvement from fat loss + mastic gum over 12 weeks
What our data shows
Our scanner has processed 35,000+ faces, and jawline is one of the most requested single metrics. The clinical reference ranges we calibrate against come from published cephalometric literature, not our own corpus (per-user analyses are not retained): the average adult gonial angle is about 135°, most adults measure 128–142° (Proffit, 2018), and the orthodontic ideal band is 120–135°.
Two published findings matter most for photo tests: forward head posture alone can add 3–8° to the apparent angle, and body fat, posture, and masseter work combined can shift the apparent angle by 3–12° without any change to the bone (Arnett & Gunson, 2004). Jaw width relative to cheekbone width also drives the classification in the face shape test, and jaw angle is one of the five bands scored in the masculinity test.
How to improve your jawline score
#1Reduce body fat (most impactful)
Facial fat sits directly over the jawline, masking bone structure. Dropping from 20% to 13-14% body fat reveals jawline definition that was always there. You cannot spot-reduce facial fat — it comes off as overall body fat decreases. 300-500 calorie deficit with high protein intake (0.8g/lb) and resistance training to preserve muscle.
#2Mastic gum (masseter training)
Mastic gum is ~10x harder than regular gum. Chewing 30-60 min daily builds the masseter muscles, creating the visible jaw "flare" that defines the jaw angle. Alternate sides every 10 minutes. You should feel jaw muscle fatigue — that's the training stimulus.
#3Posture correction
Forward head posture compresses the neck and pushes the chin forward, softening the jaw profile. Chin tucks (30 reps, 3x daily) and wall angels (10 reps, 2x daily) correct this within weeks. The improvement is partly postural and partly real — better posture also holds the head in a more flattering position for photos.
#4Beard line optimization
A clean shave below the jawline (everything below the jaw border) creates high contrast that makes the jaw edge read as sharper. Stubble or beard along the jaw adds shadow that enhances definition further. This doesn't change your actual jaw angle but significantly changes how it reads in photos and in person.
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Test My Jawline →Frequently asked questions
How is jawline measured by AI?
AI detects the mandibular boundary landmarks and calculates the gonial angle — the angle at the jaw corner where the vertical ramus meets the horizontal mandibular body. Reported in degrees with a percentile ranking.
What is a good jawline score?
120-130° is elite (top ~10%). 131-140° is above average. 141-148° is average for most people. Above 149° scores below average. Most people improve significantly through fat loss alone.
Can you improve your jawline naturally?
Yes. Body fat reduction reveals underlying jaw definition (most impactful). Mastic gum builds masseter muscle. Posture correction sharpens the jaw profile. Combined, these can improve apparent jawline angle by 5-7° in 12 weeks.
Does jawline change with age?
Yes — gonial angle increases ~1-2° per decade after 30. Maintaining low body fat and strong jaw muscles slows this. Significant fat gain accelerates perceived jaw softening.
Is a sharp jawline attractive?
Cross-cultural research consistently finds defined jawline is among the most robust male attractiveness predictors. The preference holds across Western, East Asian, and African populations.
Does chewing gum sharpen your jawline?
It can change how your jaw reads, within limits. Chewing trains the masseter — the muscle over the back corner of the jaw — and a fuller masseter can widen and define that area. The published framing matters, though: body fat, posture, and masseter work combined shift the apparent jaw angle by roughly 3–12° (Arnett & Gunson, 2004); none of it changes the underlying bone. Gum is the smallest of those three levers — fat loss usually moves the read far more than chewing does.
Is jawline mostly genetic?
The bone is; the read is not. Mandible shape and the true gonial angle are set by genetics and growth, and in adults they only change through surgery. What a photo shows is bone plus everything over it: cephalometric standards put most adults at a 128–142° gonial angle (Proffit, 2018), yet forward head posture alone can add 3–8° to the apparent angle, and soft-tissue factors can shift the apparent read by 3–12° in total (Arnett & Gunson, 2004). Two people with identical bone can photograph very differently.
What is the difference between jawline angle and gonial angle?
The gonial angle is a clinical measurement taken from a cephalometric X-ray at the gonion — where the vertical ramus meets the body of the jaw — and most adults measure 128–142° (Proffit, 2018). A photo test cannot see bone, so this scan measures a different, related angle: the angle formed at the chin point between lines to the mid-jaw landmark on each side (full-credit band 44–54° for male scoring, 50–62° for female). Both describe jaw sharpness, but the numbers are not interchangeable.
What is a good jaw-to-cheek width ratio?
Jaw taper compares jaw width at mid-jaw with cheekbone width. The scan gives full credit at 0.72–0.85 for male scoring and 0.62–0.75 for female — a lower ratio means the face narrows more from cheekbones to jaw (a V-shaped taper), while a ratio near 1.0 reads square. These are scoring conventions calibrated to the landmark scan, not clinical thresholds.
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