Facial Thirds Calculator: Compare Your Middle and Lower Thirds
Compare the middle and lower thirds of your face from a photo and see how your lower third compares with typical faces.
- Photo stays on your device
- No sign-up
- Free, no limit
Add a front-facing photo
JPG, PNG or WebP · up to 10 MB · one face, looking straight ahead
- Your photo never leaves your device.
- For adults 18+.
Loading the face model (about 6 MB, once)…
Your result shows up here
A PSL range, three geometry scores, your eye type and the lines we measured.
By the numbers
- face points found in your browser
- 478
- ratios and angles measured
- 22
- people rated the faces our ranges come from
- 2,513
- photos sent to a server
- 0
Typical ranges
Typical ranges we compare you with
From 101 adult faces rated by 2,513 people (Face Research Lab London Set). Where men and women differ, both ranges are shown; you choose which one applies.
| Measurement | Typical range | Centre | What it is |
|---|---|---|---|
| Middle to lower third | 0.85–1.11 | 0.97 | Neoclassical canon: equal facial thirds; measured lower thirds tend to be slightly longer. |
| Lower third share of face height (male) | 0.50–0.55 | 0.52 | Subnasale-to-menton over glabella-to-menton height. |
| Lower third share of face height (female) | 0.47–0.52 | 0.50 | Subnasale-to-menton over glabella-to-menton height. |
How it works
Three steps, about a minute
Step 1: Add a photo
Upload a front-facing photo or use your camera: good light, neutral face, lips closed.
Step 2: Get measured
Your browser places 478 points on your face and computes the measurement on the spot.
Step 3: Read your number
See your value next to the typical range, with the lines drawn on your photo.
What it measures
Facial thirds, measured
- The classic rule
- Artists split the face into three equal parts: hairline to brows, brows to the base of the nose, nose to chin. Real faces rarely match exactly.
- Middle to lower third
- We compare the middle third (brows to the base of the nose) with the lower third (nose to chin). Measured faces usually have a slightly longer lower third, so the typical ratio is a little under 1.
- Why not the upper third
- The hairline is not a stable face point: it moves with hair, styling and hair loss. We leave the upper third out instead of guessing it.
- Lower third share
- The second number is the lower third as a share of the face from brows to chin. Men usually have a slightly larger share than women.
Photo tips
Take a photo that measures well
- Face the light
- Stand facing a window or a lamp so both sides of your face are lit evenly. Light from one side or from above throws shadows that shift where the jaw, nose and eye corners appear, and a dark photo is rejected.
- Hold the camera at arm's length
- A phone held close to the face widens the nose and the middle of the face. Hold it at arm's length or prop it up a little further away, then crop if you need to. The ratios do not depend on how big your face is in the frame.
- Keep your head level
- Put the camera at eye level and look straight into the lens. A raised chin shortens the lower face and a lowered chin lengthens it. The test rejects photos with too much tilt or turn, so you will see a hint if this happens.
- Neutral face, lips closed
- Smiling lifts the cheeks and changes the mouth, eye and jaw measurements. Use a relaxed expression with your lips together and your eyes open as they normally are.
- Show the whole face
- Keep your full face in the frame from forehead to chin, push hair away from the jawline and take off glasses. Hats, hands and heavy filters hide the points the test needs.
- Compare two or three photos
- Every photo is a little different. Take a few in the same spot and look at the range they give you rather than trusting a single result.
Privacy and accuracy
What happens to your photo
Your photo stays on your device
The free test runs inside your browser. Your photo is not uploaded, stored or sent to anyone, and we keep no copy of your scores.
How far to trust the numbers
Lighting, lens distance, head angle and expression all shift facial ratios. Take two or three photos and compare. The typical ranges and the 1–8 scale are set from 101 adult faces that 2,513 people rated for attractiveness (Face Research Lab London Set, DeBruine & Jones 2017, CC BY 4.0). On those faces the geometry score agrees with the ratings only in part, because proportions are only part of attractiveness.
Head tilt matters here
Raising the chin shortens the lower third in a photo and lowering it lengthens it. Keep the camera at eye level.
More free tests
Run another free test
All measurements, PSL range and eye type in one go.
The angle of each eye, corner to corner.
Facial width-to-height ratio.
Pupil distance against midface height.
How evenly the two sides match.
Face length to width, next to 1.618.
FAQ
Questions people ask
- Are equal facial thirds ideal?
- Equal thirds are an art convention. On the rated faces we calibrated with, the typical middle to lower ratio is about 0.85 to 1.11, centred around 0.97.
- Why is my lower third longer?
- That is the most common pattern. Smiling, an open mouth or a lowered chin in the photo also lengthen it.
- Can a beard change the result?
- Yes. A full beard can hide the chin outline, so the chin point may be placed differently. Measure with the chin visible if you can.
Ready when you are
One photo, about a minute, nothing uploaded.