Upload your photo to measure how evenly your face divides into upper, middle, and lower thirds — the foundational principle of classical facial beauty.
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Facial thirds divide the face vertically into three sections:
The classical rule of facial proportion says that in a well-balanced face, these three sections are roughly equal in height — each about a third of the face. The idea goes back to Renaissance artists, who used it as a guide for drawing faces, and it's still used today by portrait artists, orthodontists and cosmetic surgeons as a quick check on vertical balance.
This free facial thirds calculator measures your three thirds from a photo and shows exactly what percentage of your face each one takes up.
You can measure facial thirds by hand with a ruler on a straight-on photo: mark your hairline, the line between your brows, the base of your nose and the bottom of your chin, then compare the three distances. The calculator does the same thing more precisely:
One difference from the hand-measured version: hairlines vary a lot and are often hidden by hair, so the calculator measures the upper third from the top of the forehead area the model detects, which usually sits a little below the hairline. If your upper third reads slightly short, that's part of the reason — the middle and lower thirds are the more reliable comparison.
| Score | Result | What it means |
|---|---|---|
| 88–100 | Ideal thirds | Your three thirds are all within a few percentage points of equal |
| 74–87 | Well-proportioned | Good vertical balance with one third slightly longer or shorter |
| 58–73 | Moderate imbalance | One third noticeably dominates or falls short |
| Below 58 | Notable imbalance | A clear difference between at least two thirds |
As a rough guide, each percentage point an average third is away from 33.3% costs five points of score. Look at your three percentages to see where the difference is:
Mostly not. When the anthropometrist Leslie Farkas measured the faces of young adults against the classical canons, he found that the classical canons — equal thirds among them — describe very few people exactly. Most attractive faces are close to equal thirds rather than precisely equal.
In general, the lower third tends to be slightly longer in men than in women, and the upper third varies a lot with hairline. So equal thirds are best treated as a guide to balance, not a target to hit to the decimal place. A face where no third is dramatically longer than the others reads as harmonious.
The underlying proportions are set by your skull and jaw, but how they look can change:
Facial thirds divide the face into three vertical sections: hairline to brows (upper third), brows to the base of the nose (middle third) and the base of the nose to the chin (lower third). In a balanced face, each is roughly a third of the face's height.
Mark the hairline, the line between the brows, the base of the nose and the bottom of the chin on a straight-on photo, then compare the three distances. This calculator does it automatically and shows each third as a percentage of your face.
Balanced facial thirds are close to 33% each. On this calculator, a score of 88 or above means all three are within a few percentage points of equal.
Upload a straight-on photo to find out. Most people don't have perfectly equal thirds — it's normal for one third to be a few percent longer than the others.
It varies. In many men the lower third is slightly longer, and people with high or receding hairlines often have a longer upper third.
You can't change the bone structure without surgery, but hairstyles, fringes and beards can visually rebalance your thirds. Surgical options exist for significant imbalances and should be discussed with a qualified surgeon.
Yes. It's free, needs no account, and analyses your photo in your browser.