PSL Calculator — Free Instant PSL Score on the 0–8 Scale

Algorithm, not magic

People ask whether a PSL calculator "uses AI" — usually meaning: can I trust the number? Here is the honest split: a small landmark-detection model finds 478 points on your face; everything after that is geometry you could verify with a ruler. No generative model looks at your photo and vibes a score. If you disagree with a reading, it is a disagreement about landmark placement — checkable, not mystical.

Three more things worth saying plainly:

• The PSL scale is a community scale, not a clinical instrument. It comes from the PSL/lookism forums: 0–8, deliberately stricter than a casual 1–10, with the population median anchored at 4.0. No clinical literature validates it. It is a fixed ruler for comparing your face to itself over time — which is exactly why determinism matters more here than anywhere.
• The same photo always scores the same. The engine is deterministic. Change the photo — angle, light, distance — and the geometry genuinely changes; that is measurement working, not drift.
• It cannot see skin, style, haircut or expression. It reads geometry: angles, ratios, deviations from your facial midline. A great haircut moves your look more than most ratios ever will — the calculator just cannot see it.

How the calculator works

Four steps, fully deterministic:

1. Detect — a landmark model places 478 points on your face (the same class of model used in medical imaging research).
2. Measure — 8 metrics are read as raw geometry: angles, ratios, and deviations from your facial midline.
3. Weight — the 8 sub-scores roll up into 5 weighted dimensions.
4. Curve — the weighted overall maps onto the 0–8 PSL curve with the median anchored at 4.0.

The 8 metrics behind the score

*FWHR is calibrated in MediaPipe normalized coordinates, where it centers near 2.75 — not the academic photo-measurement value of ~1.85. Same geometry, different ruler. See the methodology.

Each metric scores 0–100 with a Gaussian falloff: 100 means dead-center on the reference band.

The five dimensions that weight them

Your score, your tier

The number lands on the community's tier map (male / female names for the same bands):

Two honest notes: the median is 4.0, not 5 — this scale is deliberately stricter than a casual 1–10, and a 5.5 already means clearly above average. And tier names are community vocabulary, not verdicts — the full breakdown lives in the tier list and the PSL scale guide.

Try it on an example face first

The calculator ships with example faces (AI-generated, spanning MTN / HTN tiers) — click one above the upload area and the full report runs instantly: score, tier, percentile, all 8 metrics, the radar. It is the fastest way to see exactly what you get before using your own photo. Example runs are free and never touch billing.

Same conditions, comparable scores

A PSL score is only comparable against another score taken the same way. The full test protocol in one paragraph:

• Same angle — front-facing, chin level, no head roll.
• Same distance & light — arm's length, even indoor light, no window behind you.
• Neutral face — brows relaxed, mouth closed, no smile squint.
• Same cadence — retake in 30 days under these conditions; the delta between two standardized runs is the real signal.

FAQ

Related tools and guides

The PSL cluster:

• PSL scale — the complete guide to the 0–8 system
• PSL tiers — every band, every name, explained
• PSL score — what the number means
• The PSL test protocol — standardized conditions, 30-day rhythm
• Free PSL rating — the no-sign-up entry point

Narrower instruments, same engine:

• Canthal tilt calculator — each eye's angle in degrees
• Facial ratios calculator — all seven ratios, midface included
• Golden ratio face calculator — the φ classics, honestly framed
• Face shape detector — oval, round, square and four more
• Methodology — every formula and weight, published

References