Face Shape Calculator
If your face is 21 cm long with 14 cm cheekbones, a 13 cm forehead, and a 12.5 cm jawline, this ruleset leans oval. This face shape calculator compares forehead, cheekbone, jawline, and face-length measurements to estimate whether your proportions lean oval, round, square, rectangle, heart, diamond, or triangle. Use the same unit for every measurement. Inches and centimeters both work because the tool compares ratios, not absolute size.
Quick answer
The rules first check which area measures widest: forehead, cheekbones, or jawline.
What this tells you
- •The rules first check which area measures widest: forehead, cheekbones, or jawline.
- •The tool then compares face length with the widest width to separate longer shapes from shorter or broader ones.
- •This is a measurement-based estimate. Hairline shape, chin point, and facial softness can shift how your face looks in real life.
How to Use
- 1Measure the widest part of your forehead in a straight line.
- 2Measure cheekbone width from the outer point of one cheekbone to the other.
- 3Measure jawline width across the broadest part of the jaw.
- 4Measure face length from the center of the hairline to the bottom of the chin.
- 5Enter all four measurements using the same unit, then calculate to see the closest category.
How It Works
Formula
Widest width = max(forehead, cheekbones, jawline)
Length-to-width ratio = face length / widest width
Diamond: cheekbones at least 8% wider than forehead and jaw, with forehead and jaw within 7% of each other
Heart: forehead at least 6% wider than jawline
Triangle: jawline at least 6% wider than forehead
Rectangle: widths stay within 12% and length-to-width ratio is at least 1.58
Oval: cheekbones are widest, length-to-width ratio is at least 1.45, and forehead is slightly wider than jaw
Round: widths stay within 12% and length-to-width ratio is 1.33 or lower
Square: widths stay within 10% and the face is not especially longThis tool uses a simple heuristic ruleset rather than a clinical standard. It compares your three horizontal measurements, looks at which area is widest, and then checks how long the face is relative to that width. The percentages and ratio cutoffs are meant to sort broad patterns, not to define an exact or permanent face shape.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Oval-leaning example
Cheekbones are the widest point, forehead is slightly wider than jawline, and face length is about 1.50 times the widest width, which fits the oval rule used here.
Heart-leaning example
The forehead is clearly wider than the jawline, which is the main heart-shape signal in this ruleset.
Face Shape Patterns Used by This Calculator
These are the broad measurement patterns the ruleset checks before assigning an estimate.
| Estimated shape | Measurement pattern used here |
|---|---|
| Oval | Face is longer than it is wide, cheekbones are widest, forehead is slightly wider than jaw |
| Round | Face width measurements stay close together and face length is close to width |
| Square | Forehead, cheekbones, and jawline measure similarly and face length is only moderately longer |
| Rectangle | Widths stay similar but face length is noticeably longer than width |
| Heart | Forehead is widest and jawline tapers narrower |
| Diamond | Cheekbones are widest while forehead and jawline are narrower |
| Triangle | Jawline is widest and forehead is narrower |
A mirror, a photo, and a tape measure can each make the same face look a little different. Treat the result as a styling guide, not a fixed label.
Common mistakes
- Mixing inches and centimeters across different fields instead of keeping one unit throughout.
- Measuring along the curve of the face instead of taking straight width measurements.
- Assuming the result is exact even when two categories look close in the mirror or in photos.
Limitations
This calculator uses a measurement-only heuristic. It does not capture chin sharpness, hairline curve, asymmetry, facial fullness, or how camera angle changes appearance. Face shape can also shift with age, body fat changes, and hairstyle, so the result should be treated as an estimate rather than a permanent classification.