Ski length calculator.

The calculator

Enter your height, weight, skill level, terrain preference, and how long you like your skis to ride. The output is a single recommended length plus a 10 cm workable range. Most skis come in 4 to 6 cm increments, so anywhere in that range is buyable.

All recommendations are starting points. If you're on the fence between two lengths, demo both. Most ski shops in resort towns will let you swap mid-day for $10 to $20.

Why most ski length calculators get this wrong

Search "ski length calculator" and the top results give you a chin-to-forehead rule. Stand the ski up next to you. If the tip reaches your chin, it's short. If it reaches your forehead, it's long. Done.

That rule was approximately right in 1995. It is not right now. Three things changed.

• Rocker happened. Tip rocker (the upturned front of the ski) means a 180 cm rockered ski has the same effective edge contact as a 170 cm flat ski. The number on the topsheet doesn't tell the whole story anymore.
• Skis got wider. A 75mm-waist groomer ski and a 110mm-waist powder ski at the same length are entirely different tools. Length without waist width is half a measurement.
• Construction got better. Modern skis dampen and turn at lengths that would have felt hooky a generation ago. Going one size up from the chin-to-head rule is now normal for advanced skiers.

The chin-to-head rule survives because it's simple. Simple is not the same as right. The Reddit thread titled "Ski Length charts all Suck." has been on Google's front page for years for a reason. The community knows.

How this calculator works

The model takes a base length from your height and skill level, then applies four modifiers:

1. Base from height and skill. Height minus 17 cm for beginners, minus 12 for intermediate, minus 7 for advanced, minus 2 for expert. A 178 cm intermediate skier starts at 166 cm.
2. Weight relative to height-for-gender average. Heavier skiers need more ski to flex; lighter skiers can ride shorter. ±3 to 6 cm depending on the gap.
3. Terrain. Powder and freeride: +7 cm. All-mountain: 0. Groomers: -3 cm. Park: -5 cm.
4. Length preference. ±4 cm if you know you like a quicker or more stable feel.

The output is rounded to the nearest centimeter and given a 10 cm workable range. Most skis are sold in 4 to 6 cm increments, so anywhere in the range is buyable.

Two things this calculator does not pretend to do: it does not pick a brand or a model, and it does not factor waist width. Length is the variable people get wrong most often. Waist width is the variable that should change with terrain. The two get conflated and shouldn't be.

Ski length chart by height (intermediate, all-mountain default)

If you want a static reference, here's the chart for an intermediate skier on all-mountain skis at average weight for height. Adjust from this baseline using the calculator above.

For powder, add 5 to 10 cm. For park, subtract 5 cm. For beginners, subtract 5 cm. Heavier than average for your height: add 3 to 6 cm. Lighter: subtract 3 to 6 cm.

If you're a beginner, ski shorter

Beginners almost always do better at the short end of the recommended range. Three reasons.

Shorter skis turn faster at slow speeds. The hardest part of learning to ski is initiating turns at low speed; longer skis fight that. Shorter skis are also more forgiving when your weight is on the wrong foot, which it will be a lot. And shorter skis carry less momentum when you fall, which matters less for safety than you'd guess but matters a lot for getting back up without your legs in a pretzel.

The classic mistake: a 5'10" first-time skier picks a 175 cm ski because the chart said so, then spends three days fighting it. The same skier on a 158 cm ski has a much better trip. By season three, scale up to the recommendation.

The trade-off is high-speed stability. Short skis chatter on groomers above about 30 mph. If you're a beginner, you're nowhere near 30 mph, so this trade-off doesn't apply to you yet.

Terrain matters more than the chart

Two skiers, same height, same weight, same skill level. One skis Vermont groomers. One skis Utah powder. They should not be on the same length ski.

Groomer carving. Shorter ski, narrower waist (70-85mm), full camber. Quicker edge-to-edge. -3 cm from the chart.

All-mountain (the default). The recommended length. 90-100mm waist. Some tip rocker. Works for groomers, works for crud, works for the occasional powder day. If you ski one ski for everything, this is what you ski.

Powder and freeride. Longer ski, wider waist (105-115mm+), heavy rocker. The length adds float. The waist adds float. The rocker means the effective edge is shorter than the topsheet number anyway. +7 cm from the chart, sometimes +10 cm if rocker is aggressive.

Park and freestyle. Shorter ski, true twin tip, balanced flex. -5 cm from the chart for most. Park ski lengths are personal; ask other skiers at your local park what they ride.

Women's-specific construction

Women's skis are not just shorter unisex skis with pink graphics. The good ones have a softer flex, mounted forward of the unisex line, with a lighter core. The mount point matters because women's hips sit further forward over the boot, and the forward-mount compensates.

If you're a woman shopping the unisex line because the colors are better, go 2 cm shorter than the unisex chart suggests. The unisex flex pattern will feel stiffer than your weight wants, and the shorter length offsets some of that.

If you're shopping women's-specific skis, the calculator already accounts for the typical 2 cm offset and the brand will have already softened the flex. Use the recommendation as-is.

Brands worth knowing for women's-specific construction: Nordica Santa Ana, Blizzard Black Pearl, Atomic Maven, Volkl Secret, Salomon Stance W, Faction Agent W, Black Crows Atris Birdie. The Black Pearl 88 in particular has held the "best all-mountain women's ski" slot in most year-end roundups for almost a decade.

Kids' ski sizing

Different ballgame. Kids grow, they're learning, and durability matters more than performance. The rule for kids:

• First-time / beginner: chin to chest. Easier to control.
• Confident on greens / blues: shoulder height.
• Aggressive / racing: chin height, possibly a touch above.

Buy junior skis used or rent for the season. Kids outgrow gear in 12 to 18 months. Most ski-town shops do junior season-rental programs for $150 to $300 with free swaps as the kid grows. That's the move.

FAQs

Is it better to have longer or shorter skis?

Depends on terrain and skill. Longer is more stable at speed, floats better in powder, and rewards strong technique. Shorter is more maneuverable, easier in trees and bumps, and more forgiving for beginners. Most people are better off slightly shorter than the chart says, until they're advanced and skiing aggressively.

Should beginners size down or up?

Down. Always. A beginner on a too-long ski is fighting the ski instead of learning. Five centimeters shorter than the chart is a normal beginner adjustment.

How does weight factor in?

Skis flex when weighted. A 200 lb skier flexes a ski more than a 140 lb skier of the same height. To feel right, the heavier skier needs either a stiffer ski or a longer one. Most people adjust through length. The calculator above adds 3 to 6 cm for skiers heavier than the height-average and subtracts the same for lighter.

Do women need shorter skis than men?

Women's-specific skis run about 2 cm shorter than the unisex equivalent for the same skier, with a softer flex and different mount point. If buying unisex, go 2 cm shorter than the unisex chart suggests. If buying women's-specific, use the chart as-is.

What if I'm between two sizes?

Pick the shorter one if you ski groomers, learn slowly, or are a beginner. Pick the longer one if you ski powder, ski fast, or are advanced. Demo both if you can. Most ski-town shops swap demos mid-day for $10 to $20.

Does waist width factor into length?

Indirectly. Wider waist usually means more rocker, which makes a 180 cm powder ski feel like a 170 cm groomer ski under your foot. The chart accounts for this through the terrain modifier (powder gets +7 cm). Don't double-correct.

How often should I replace my skis?

Recreational skiers: every 100 to 150 days on the snow, or 5 to 8 years. The base wears, the camber flattens, and the edges stop holding. If you're skiing 30 days a year, that's a new pair every 4 to 5 years. If you're skiing 5 days a year, your skis will be fine for a decade.