Face Shape Calculator

What this calculator does

Ever stood in an optician's trying on frames, or shown a hairdresser a photo, and been told something "suits your face shape"? This tool is a way to put a name to that. You give it four measurements of your face, and it works out which of the common face shapes you are closest to.

It is worth being clear from the start: this is a styling tool, not a health or beauty test. Knowing your face shape is genuinely handy for choosing glasses, hairstyles and even how to frame a photo, and that is all it is for. Below are the shapes it uses, how to take the measurements, and roughly how it makes the call.

The face shapes it sorts into

The calculator compares the width of your forehead, cheekbones and jaw against the length of your face, and lands on one of these:

• Oval. Longer than it is wide, with the cheekbones the widest point and a gently rounded jaw.
• Round. Width and length are similar, with soft, full cheeks and a rounded chin.
• Square. Forehead, cheeks and jaw are close in width, with a strong, angular jawline.
• Oblong (or rectangle). Like a longer square: similar widths, but the face is notably longer than it is wide.
• Heart. A wider forehead narrowing down to a pointed chin.
• Diamond. Cheekbones the widest point, with a narrower forehead and jaw.
• Triangle. A wider jaw narrowing up toward the forehead.

Most people are a blend, leaning toward one of these rather than matching it perfectly. The label is a useful shorthand, not a precise category your face has to fit.

How to measure your face

This is the part that decides whether the answer means anything, and the measurements are less obvious than a waist or height. Use a soft tape or a ruler against a mirror, or measure from a straight-on photo. All four go in as centimetres.

• Forehead width. Across the widest part of your forehead, roughly halfway between your eyebrows and your hairline.
• Cheekbone width. Across the top of your cheekbones, from the outer corner of one to the other, passing just under the eyes.
• Jawline length. From the tip of your chin to the point where your jaw angles up toward your ear, then double it for the full jaw, following how the tool expects the measurement.
• Face length. From the centre of your hairline straight down to the bottom of your chin.

Measure with a neutral expression, looking straight ahead. Taking each measurement twice helps, since small differences can tip you from one shape to a neighbouring one.

How the calculator decides

There is no complicated maths here, just comparisons. The tool looks at which measurement is largest and how the others relate to it. If your face is clearly longer than it is wide and your cheekbones are the widest point, it leans oval or oblong. If length and width are close, it leans round or square depending on how angular your jaw is. A wide forehead tapering to a narrow chin points to heart, and cheekbones wider than both forehead and jaw point to diamond.

As an example, a face measuring 12 cm across the forehead, 14 cm across the cheekbones, a 13 cm jawline and a 16 cm length would come out as oval: longer than it is wide, cheekbones widest. Small measurement changes can shift the result, which is exactly why careful, repeated measuring is worth it.

A note on taking it seriously

Two honest things, so you get the right amount out of this. First, face-shape categories are a styling convention, not science. There is no official medical or anatomical standard that says a face is "a diamond", and different guides draw the lines slightly differently. So treat your result as a helpful nudge for choosing frames or a haircut, not a fact about yourself.

Second, and more importantly, every face shape looks great. This tool cannot and does not rank faces, and there is no better or worse result to get. It exists to make a practical decision easier, like which glasses to try first, and that is the whole of its job.

Questions people ask

Why does it ask for my gender if it does not change the shapes?

Honestly, the face shapes themselves are the same regardless, so the result comes from your measurements, not your gender. The categories, oval, round, square and the rest, apply to everyone.

How do I use my face shape to pick glasses?

The usual styling idea is to contrast: rounder faces often suit more angular frames, and more angular faces often suit softer, rounder frames, while oval faces tend to carry most styles well. It is a rule of thumb, not a rule, so the best test is still trying frames on.

What if I am between two shapes?

That is the most common outcome, since most faces are a blend. Take the closest label loosely and borrow styling ideas from both. Nothing about your face has to fit neatly into one box.

References and sources

A word on sourcing, in the interest of honesty. Unlike the body-measurement tools on this site, face shape has no scientific or clinical standard behind it. The categories used here, oval, round, square, oblong, heart, diamond and triangle, are a widely shared styling convention, drawn from beauty, eyewear and hairdressing practice rather than from any single authoritative study, and different guides define the boundaries a little differently. The tool simply compares your four facial measurements and reports the closest of those conventional shapes. Treat the result accordingly: a practical styling guide, not a measurement of anything medical.