Stated definition
Vertical distance from the interpupillary line to the top of the upper lip, divided by the distance between the pupils.
Local ratio tool
Midface Ratio Calculator
Midface ratio is quoted constantly and defined inconsistently. This page states the definition it uses, shows both underlying distances in pixels, and reports where your measurement lands.
Analyze a photo locally →On-device analysis
Calculate your midface ratio
Both distances are measured from local landmarks in this browser and shown alongside the ratio.
Photo stays in this browser
Choose one clear adult portrait
Front-facing, neutral expression, even light. JPG, PNG, WebP, HEIC or HEIF up to 10 MB.
or drag and drop it here
Before you analyze
- 1Use your own photo, or one you have permission to use.
- 2One adult face only. No minors or age estimation.
- 3Results describe this photo, not objective beauty or health.
A typical first run loads about 15 MB of model/runtime files, then the browser caches them. Nothing is submitted to our analysis API.
Loading local face model…
The first run can take a moment. Your photo remains on this device.
We could not analyze this photo
Local mode: the selected image and detected landmarks are held in page memory only and are cleared when you reset or leave.
What it measures
Evidence behind this result
The output is built from inspectable photo geometry and a separate image-quality signal.
Both distances
The numerator and denominator are printed in pixels so the ratio can be checked rather than trusted.
Context ratio
The midface is also expressed as a share of total visible face length.
01Visible landmarks
02Normalized geometry
03Explainable output
Three-step method
How this tool works
Locate
Eye centres and the upper-lip landmark are detected locally.
Rotate
Distances are taken in an eye-line-aligned frame so small head roll does not inflate the height.
Divide
The height is divided by the interpupillary distance to give a scale-independent ratio.
478 visible landmarksMediaPipe Tasks Vision 0.10.35Model: float16 v1Runs in browser
Read the shared methodology →Interpret carefully
What the result cannot tell you
01
Published midface definitions differ; a value from another calculator will not necessarily match this one.
02
Camera distance and lens focal length compress or stretch vertical facial distances.
03
A compact or elongated reading is a description of proportion, not a defect or a target for treatment.
What is a good midface ratio?+
Sources that quote a reference usually place it near 1.00, meaning the eye-line-to-lip height is close to the distance between the pupils. This page treats roughly 0.95–1.05 as balanced and describes anything outside it directionally rather than as a fault.
Why does my ratio differ from another calculator?+
Because the landmarks differ. Some tools measure to the nose base, some to the mouth centre, and some use bizygomatic width instead of interpupillary distance. This page states its own definition on the result.
Does camera distance matter?+
Yes, considerably. A close phone selfie enlarges the nose and midface region relative to the pupils. Step back and zoom in for a more stable measurement.
Keep exploring
View all tools →Related tools
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