Face Shape Calculator - Oval, Round, Square, Heart

A face shape calculator is a styling tool that turns four measurements of your face - forehead width, cheekbone width, jawline width, and face length - into a single shape label such as oval, round, square, heart, diamond, oblong, or triangle.

The tool is built for situations where you want a measurement-based answer to "what is my face shape?" rather than a visual quiz. The label becomes the starting point for eyewear, hairstyle, and accessory decisions, not a measure of how your face should look.

• • Eyewear and frame selection: Pair the label with frame shapes that match the proportions - angular frames for round faces, curved frames for square faces, top-heavy frames for oblong faces.
• • Hairstyle and bangs: Pick a haircut length, parting, and bang style that flatters the bone structure - side-swept bangs soften square and heart faces, blunt bangs balance oblong faces.
• • Accessories and necklines: Choose earring shapes, necklace lengths, hat brims, and scarf styles that visually rebalance the face rather than fight it.
• • Stylist and client communication: Hand a stylist the four measurements during a consultation and walk through frame and hair options without re-measuring on the spot.
• • Tracking change over time: Repeat the measurements every few months so you can see whether weight, age, or hair changes have shifted the label by a category.

If you also want a body-level label, our body type calculator applies the same measurement approach to shoulders, bust, waist, and hips, so head and body styling decisions can speak the same proportions language.

The calculator reads the four measurements, converts imperial inputs to centimetres behind the scenes, computes three ratios against the cheekbone width, and matches the combination to one of seven shape rules.

• foreheadWidth: Widest point across the forehead, just above the eyebrows, in cm or inches (0.1 cm or 0.05 in precision).
• cheekboneWidth: Distance across the most prominent part of each cheekbone, just below the outer corner of the eyes.
• jawlineWidth: Width of the jaw from one angle of the jaw to the other, just below the ears.
• faceLength: Vertical distance from the center of the hairline to the tip of the chin, kept vertical against the face.

The seven shape rules check the length-to-width ratio first (oblong at 1.6 and above, square or round below 1.35, oval in the 1.35-1.6 band) and then look at which band is widest. Diamond fires when the cheekbones beat the forehead and the jawline by at least 1 cm, triangle when the jawline beats the cheekbones by 0.6 cm, and heart when the forehead is at least as wide as the cheekbones and the jawline is at least 1 cm narrower than them.

According to the Wikipedia article on cephalometric analysis, clinicians and orthodontists use the same forehead, nasion, cheekbone, jaw, and chin landmarks to plan treatment, so the four measurement points behind this calculator overlap with the ones used in clinical cephalometry, even though the seven-shape labels themselves are a styling convention layered on top.

Four ideas come up every time a stylist reads a face. Understanding each one turns the label from a guess into a defensible styling decision.

Body weight sits behind the soft tissue that rounds out the cheekbones and jawline, so if your label is changing over time, a weight gain calculator can help you check whether a recent change in body weight matches the timing of the face-shape shift.

Work the inputs in this order so the four numbers you enter describe the same face in the same units.

1. 1 Pick the unit: Choose centimetres or inches at the top of the calculator so the numbers match the tape you have on hand.
2. 2 Measure forehead width: Stand in front of a mirror, hold a soft tape across the widest part of the forehead just above the eyebrows, and read the number to the nearest 0.1 cm or 0.05 in.
3. 3 Measure cheekbone width: Measure from the most prominent point of one cheekbone to the other, just below the outer corner of each eye. Keep the tape level and do not pull it tight.
4. 4 Measure jawline width: Place the tape at one angle of the jaw, just below the ear, and run it across to the other side. This is the widest part of the lower face.
5. 5 Measure face length: From the center of the hairline (or where your hairline would naturally start) straight down the center of the face to the tip of the chin. Use a mirror and keep the tape vertical.
6. 6 Read the result: The result panel shows the face-shape label, the length-to-width ratio, and the forehead and jawline ratios so you can see why the label was chosen.

A reader who measures forehead 14 cm, cheekbones 14 cm, jawline 13.5 cm, and face length 17.5 cm sees lengthRatio 1.25, jawline 0.5 cm narrower than the cheekbones, and the result labels as Square with a note to try angular frames and a side-part haircut.

If you want to put the result in a broader body context, the body surface area calculator uses a different set of body measurements, so running both shows whether the head and the body read as similar proportions.

The calculator is most useful when a styling decision has to be made quickly and the choice depends on the proportions of the face.

• • Eyewear guidance: Pair the label with frame styles that match the proportions. Oval faces suit most frames, round faces look balanced with angular or rectangular frames, and oblong faces benefit from frames with strong top bars and a deeper lens.
• • Hairstyle and bangs: A face-shape reading helps you pick a haircut length and bang style. Side-swept bangs soften square and heart faces, blunt bangs balance oblong faces, and long layers round out a square jaw.
• • Accessory and neckline choices: Earring shapes, necklace lengths, and hat brims all read differently on each face shape. Knowing the label helps you choose pieces that visually rebalance the face.
• • Quick reference for stylists and clients: Stylists can paste the four measurements into the calculator during a consultation, give the client a label, and walk through frame and hair options without re-measuring on the spot.
• • Tracking change over time: Repeat the four measurements every few months. Weight, age, or hair changes can shift one band by a few millimetres and change the label, which helps you understand which accessories to refresh.

If a face shape label jumps categories over a few months, the change is usually soft-tissue, so a lean body mass calculator can help you check whether muscle and weight changes match the timing of the shift.

Five variables change the predicted label, and at least two of them can push the answer across a rule boundary.

• • This calculator classifies facial proportions, not beauty, attractiveness, or identity. The result is a styling starting point, not a measure of how your face should look.
• • Face-shape rules are style conventions, not medical categories. They do not diagnose or screen for any health condition, and they are not a substitute for advice from a licensed dermatologist, optician, or stylist.

If you are tracking how weight or training changes the face, a healthy weight calculator gives a general body context alongside the four face measurements, which helps when the cheekbone or jawline band changes by a few millimetres.

The Wikipedia entry on anthropometry describes the field as the systematic measurement of the human body and its dimensions, including head and face landmarks, and notes that those dimensions vary across populations, which is one reason face-shape labels read differently on different faces.

The MedlinePlus entry on chin augmentation notes that surgeons and orthodontists use x-rays and direct measurements of the chin and jaw to plan facial procedures, so the same face-length and jawline landmarks used here are also measured when facial proportion matters clinically.