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Nasolabial Angle Analysis

Upload a lateral profile photo, place 3 soft-tissue landmarks, and instantly measure the nasolabial angle — with Protrusive / Normal / Retrusive interpretation.

Free — no login Burstone & Ricketts norms Printable report
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1

Upload photo

True lateral, Natural Head Position

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2

Place 3 landmarks

Columella · Subnasale · Labrale Superius

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3

Get measurement

Angle + clinical interpretation + PDF

Start Your Analysis

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Click to select or drag and drop

JPEG, PNG, WEBP — max 15 MB

Landmark placement tips

• Cm (Columella) — lower border of the nose, between nostrils — NOT the nasal tip

• Sn (Subnasale) — the groove below the nose base — this is the angle vertex

• Ls (Labrale Superius) — most anterior point of upper lip — NOT the vermilion border

• Zoom in 3–5× before placing each point for accuracy

Frequently Asked Questions

What is the normal nasolabial angle?

90°–110° is normal per Burstone (1958) and Ricketts (1968). Below 90° = Protrusive upper lip. Above 110° = Retrusive upper lip.

Where exactly is Subnasale (Sn)?

Subnasale is the groove/junction where the base of the nose meets the upper lip. It is NOT on the nose prominence — it is in the concavity just below it. This is the vertex of the nasolabial angle measurement.

What does a protrusive angle mean for treatment?

A nasolabial angle below 90° suggests the upper lip is forward — typically associated with upper incisor proclination or Class II patterns. Retraction of upper anteriors (often with extraction) may reduce the protrusion. Maximum anchorage should be considered.

Can I print the report?

Yes — the result page includes Print and Download buttons. Use your browser's Print → Save as PDF for a digital copy with the annotated image and clinical interpretation.

Is this tool free?

Yes — free, no login, no account required.