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The facial width-to-height ratio is the one proportion with a research literature behind it. Symmi measures it the way the papers define it, bizygomatic width over upper-lip-to-upper-eyelid height, and gives you the midface ratio alongside.
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Straight-on, whole face visible, even light. JPG, PNG or WebP.
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How it is measured
Width is measured across the widest points of the cheekbones. Height is the vertical distance from the upper lip to the upper eyelid line, which is why fWHR is usually between 1.6 and 2.2. The midface ratio uses the pupil-to-pupil distance against the height from the pupil line to the upper lip, and is the reading the Symmi app scores.
Measure it yourself
You need one photo and a ruler, or any photo editor that shows pixel positions.
Skip the ruler: the free tool above does it from one photo in about 30 seconds ↑
What's normal
Most faces fall between 1.6 and 2.2, with a population mean of about 1.9. Men rated attractive in several studies cluster around 1.9 to 2.0; women slightly lower.
fWHR describes a proportion, not a personality. The links to perceived dominance in studies are small and disputed.
Sources
The measurement and its reference ranges come from published research. Studies use different methods and populations, so compare your number with the range shown on this page rather than with other tools.
Weston EM, Friday AE, Liò P (2007). Biometric evidence that sexual selection has shaped the hominin face. PLoS ONE. PubMed 17684556
Defines facial width-to-height ratio (cheekbone width over upper-face height) and shows it differs between the sexes.
Carré JM, McCormick CM (2008). In your face: facial metrics predict aggressive behaviour in the laboratory and in varsity and professional hockey players. Proceedings of the Royal Society B. PubMed 18713717
The study that linked higher fWHR to aggressive behaviour in men, which made the measure widely known.
Geniole SN, Denson TF, Dixson BJ, Carré JM, McCormick CM (2015). Evidence from meta-analyses of the facial width-to-height ratio as an evolved cue of threat. PLoS ONE. doi:10.1371/journal.pone.0132726
Meta-analyses: links to perceived threat hold up, while the average sex difference is very small.
Kosinski M (2017). Facial width-to-height ratio does not predict self-reported behavioral tendencies. Psychological Science. doi:10.1177/0956797617716929
In a very large sample, fWHR did not predict self-reported behavioural tendencies.
Kartynnik Y, Ablavatski A, Grishchenko I, Grundmann M (2019). Real-time facial surface geometry from monocular video on mobile GPUs. arXiv. arXiv:1907.06724
The face-mesh model that places the 468 surface landmarks this tool measures from.
Ablavatski A, Vakunov A, Grishchenko I, et al. (2020). Real-time pupil tracking from monocular video for digital puppetry. arXiv. arXiv:2006.11341
The iris model that adds 10 eye landmarks (478 in total), used for pupil-based reference lines.
Our own data: how much each reading moves when the same face is photographed again is published on the methodology page. How we choose sources.
Related tools
FAQ
It is a proportion that has been correlated in studies with perceived dominance and, in some samples, with behaviour. The effects are small and disputed. It is worth knowing your number; it is not worth reading your personality from it.
There is no single ideal value. Men rated attractive in several studies cluster around 1.9 to 2.0; women slightly lower. Faces well outside 1.7 to 2.1 read as noticeably long or wide.
1.6 to 1.7 reads as a long, narrow face. 1.8 to 2.0 sits around the population mean of about 1.9 and reads as balanced. 2.1 and above reads as wide and is the range the dominance studies discuss.
It shows the midface ratio as a second reading: pupil-to-pupil distance over the height from the pupil line to the upper lip, with 0.95 to 1.15 as the band the Symmi app uses. For the full breakdown with both distances drawn on your photo, use the Midface Ratio Calculator.
The bone width cannot. The height reading shifts a little with brow position and lip posture, and the visual width shifts with cheek fullness. The Symmi app tracks the midface ratio across rescans.
No. The calculation runs in your browser.
A controlled scan, every reading against its ideal band, bone vs trainable, a plan, and a 3D model on Face ID iPhones.