Will your legs still look proportionate?
Limb lengthening makes you taller by lengthening your legs — so it also changes the ratio between your legs and your torso. Enter your height and a target gain to see your projected new height and leg proportion, and whether it stays inside the natural human range.
From 170 cm (5′7″) — a 5.0 cm gain.
Slightly long legs. This is roughly where cross-national research finds proportions are perceived as most balanced.
Adult average is ~48% legs; most people fall between 46% and 51%. These are population estimates — real anatomy, cartilage, and soft-tissue limits vary, and proportion perception is subjective. This is educational, not medical advice or a surgical plan. Only a surgeon who has examined you and reviewed your imaging can set a safe target.
The anthropometry behind the number
Your standing height is the sum of two parts: your sitting height (torso, neck and head) and your subischial leg length (everything below the hip). Across adult populations the sitting-height ratio averages about 0.52 — so legs make up roughly 48% of stature, and most adults fall between 46% and 51%.
Limb lengthening adds bone to the femur or tibia — both below the hip — so it lengthens the leg while the torso stays exactly the same. That means your projected leg-fraction is simply (current leg + gain) ÷ (current height + gain). A 6–8 cm gain nudges a typical 48% up toward 50–51%: taller, slightly longer-legged, still well within the normal range. Very large gains push past ~52–53%, where a body starts to read as long to many observers.
On what looks “balanced”: a study across 27 nations (3,000+ participants) found that moderately long legs — about half a standard deviation above average — are perceived as most proportionate, while extremes in either direction are consistently rated less so. We report where your projection lands against that range; we don’t tell anyone what they should look like.
Sources: Leg length, body proportion & health (PMC); nationwide sitting-height/leg-length references (PubMed); cross-national leg-to-body-ratio attractiveness research.
How much of my height is leg?+
On average about 48%. Standing height is the sum of sitting height (torso, neck and head) and subischial leg length; across adult populations the sitting-height ratio averages ~0.52, leaving legs at roughly 48% of stature. Most people fall between 46% and 51%. Women average about 1% longer legs than men of the same height.
Does limb lengthening change my body proportions?+
Yes. The surgery adds length to the leg only — your torso does not change. So both your height and the share of your height that is leg go up. Gaining 6–8 cm shifts a typical 48% leg-fraction toward 50–51%. Small gains stay well inside the normal range; very large gains push the leg-fraction past the usual human range, which is when a body can start to look disproportionate.
What leg proportion looks disproportionate?+
There is no single cutoff, and perception is subjective. A 27-nation study of over 3,000 people found that moderately long legs (about half a standard deviation above average) are perceived as most balanced, while extremes in either direction — very short or very long legs — are consistently seen as less proportionate. In practice, projected leg-fractions beyond roughly 52–53% of height start to read as long to many observers.
How accurate is this calculator?+
It estimates your current leg length from population averages for your height and sex, then applies the gain. If you enter your real inseam it is more accurate. It is an educational estimate, not a surgical plan — real cartilage, soft-tissue and nerve limits vary per person, and only a surgeon who has examined you and reviewed your imaging can set a safe target gain.