Ski length calculator: size by height, weight, ability and discipline
A ski standing on its tail should reach between your chin and the top of your head. For an intermediate all-mountain skier that is roughly your height in centimetres minus 5, then corrected for weight: a 5 foot 10 skier at 175 lb lands on a 173 to 181 cm ski, and the same skier at 130 lb lands on 168 to 176 cm. Beginners go 6 to 9 cm shorter, powder skis go about 8 cm longer.
Ski length is decided by four things together and most charts use one of them. Height sets the starting point, discipline moves it, ability moves it again, and weight corrects the result, because a ski is a spring and a heavier skier bends the same ski further. The calculator below applies all four and shows its working, because a size you cannot explain is a size you cannot argue with in a shop, and the shop is usually right.
Ski length calculator
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Feet and inches.
In ski clothing, roughly. Precision is not required.
A starting point built from published industry sizing conventions, not a measurement we took. Manufacturers publish their own size guides per model and those win where they disagree, and a shop with the ski in their hand wins over both.
The reference grid, if you would rather read it than type
All-mountain skis, intermediate ability, in centimetres. These are the centres of the windows and each one is roughly plus or minus 4 cm.
| Height | 130 lb | 160 lb | 190 lb | 220 lb |
|---|---|---|---|---|
| 5'0" (152 cm) | 147 cm | 152 cm | 152 cm | 152 cm |
| 5'2" (157 cm) | 152 cm | 157 cm | 157 cm | 157 cm |
| 5'4" (163 cm) | 158 cm | 161 cm | 163 cm | 163 cm |
| 5'6" (168 cm) | 163 cm | 163 cm | 168 cm | 168 cm |
| 5'8" (173 cm) | 165 cm | 168 cm | 173 cm | 173 cm |
| 5'10" (178 cm) | 170 cm | 173 cm | 176 cm | 178 cm |
| 6'0" (183 cm) | 173 cm | 178 cm | 178 cm | 183 cm |
| 6'2" (188 cm) | 178 cm | 180 cm | 183 cm | 186 cm |
| 6'4" (193 cm) | 183 cm | 185 cm | 188 cm | 191 cm |
Read across a row and you can see the whole point of the calculator: at 5 foot 10 the answer moves by 10 cm across the weight range, which is more than a full size step. That is the correction height-only charts throw away.
Why a ski is a spring, and why that decides the length
A ski works by bending. When you tip it on edge and load it, the sidecut and the flex pattern make it bend into an arc, and the ski then travels along that arc, which is what a carved turn is. Everything about length follows from that. A longer ski has more contact length and more material, so it takes more force to bend and it resists being deflected off its line. A shorter ski bends more easily, pivots faster, and gives up stability.
Mass is what supplies the force. A 220 lb skier and a 130 lb skier on the same ski at the same speed are not doing the same thing to it: the heavier skier bends it further into a tighter arc, and the lighter one may never bend it at all. That is why the weight correction here is worth up to 5 cm in either direction, and why an experienced shop asks your weight before your height.
The chin-to-forehead rule survives because it encodes this reasonably well for an average build. It fails at the edges, which is exactly where people get bad advice: a tall light skier ends up on a plank they cannot work, and a short heavy skier ends up on a ski that folds under them in the first hard turn.
What each discipline does to the number
Carving and piste skis run short and narrow, roughly 11 cm under your height, because everything about them is optimised for edge hold on firm snow and a shorter ski changes edge faster. All-mountain skis sit about 5 cm under your height, which is the compromise that covers most days at most resorts.
Freeride and powder skis run about 3 cm over your height, and often more, because length and surface area are what float you. A powder ski is doing a different job: it is planing rather than carving, and a planing surface wants area. Park skis run short and twin-tipped so the ski can be swung, spun and ridden backwards without a tail catching.
Touring skis sit slightly shorter than a freeride ski for the same use, around 3 cm under your height, and the reason is not performance. A shorter ski is lighter and much easier to kick-turn on a steep skin track, and on a long climb both of those matter more than the last few centimetres of float. That is the two-ladder split showing up inside a single number.
Waist width is a separate decision, and it interacts
Length and waist width are chosen together because a wider ski floats at a shorter length. If you are moving from an 84 mm all-mountain ski to a 106 mm freeride ski, you do not simply add the freeride offset, because some of the float you are buying comes from the extra width rather than the extra length. The waist width chart covers what each band is good at, and one practical constraint worth knowing before you buy: the binding brake has to sit within about 15 mm of the ski waist, or it either drags in the snow or catches on everything.
Where this number stops and a person starts
The window is about eight centimetres wide and inside it the choice is preference, informed by what you actually ski. If your home mountain is icy and fast, take the longer end. If it is tight trees and bumps, take the shorter end. If you are between two available lengths and genuinely cannot decide, most skiers are happier on the shorter one, because agility is felt every run and stability at the limit is felt occasionally.
Once you have a length, price the rest of the setup rather than optimising this one item: the build guides cost a complete kit line by line with a running total. Size the boots with the mondopoint calculator, because the boot decides whether the day is enjoyable far more than the ski does, and check the full ski length chart if you want the grid in printable form.
Frequently asked questions
How long should my skis be?
A ski standing on its tail should reach somewhere between your chin and the top of your head. For an intermediate all-mountain skier that works out to roughly your height in centimetres minus five, then corrected for weight, because a ski is a spring and a heavier skier bends the same ski further. A 5 foot 10 skier at 175 lb lands around 173 to 181 cm; the same skier at 130 lb lands closer to 168 to 176 cm.
Does weight or height matter more for ski length?
Height sets the starting point and weight corrects it, and the correction is large enough to move you a full size. Two skiers of the same height and very different mass bend the same ski by different amounts, so a heavy skier on a short ski overpowers it and a light skier on a long one never bends it enough to turn. Any chart that uses height alone is giving both of them the wrong answer.
Should beginners buy shorter skis?
Yes, by roughly 6 to 9 cm against the intermediate figure. A shorter ski turns faster, is easier to recover when it starts doing something you did not ask for, and is far more forgiving of a mistake. The cost is stability at speed, which is not a limitation a new skier is anywhere near yet.
How much longer should powder skis be?
Roughly 8 cm longer than an all-mountain ski for the same skier, and often longer than your standing height. Length and surface area are what float a ski in deep snow, and a powder ski is usually wider as well, which adds to the effect. The trade is that a long wide ski is slow edge to edge and tiring on hard snow.
Are womens skis sized differently?
The sizing logic is identical, because it is driven by height, mass, discipline and ability rather than by who is skiing. What womens-specific models usually change is flex and mount point: a softer flex bends at the speeds a lighter skier actually skis, and a mount point shifted slightly forward suits a different centre of mass. Those are useful for any lighter skier regardless of who the model is marketed to.
Can I ski a length outside the recommended range?
Yes, and plenty of people do deliberately. The window this calculator gives is about eight centimetres wide and the choice inside it is genuinely preference. Going shorter than the window buys agility and gives up stability and float; going longer buys stability and float and gives up agility and forgiveness. What is worth avoiding is being outside the window by accident because a chart used height alone.
How we choose: we compare published manufacturer specifications, published certification standards and verified owner reviews across retailers. We do not test equipment in person, and every figure quoted here is the manufacturer's published number unless we say otherwise. This is researched buying guidance and not professional instruction: binding release values are set by a certified technician on a calibrated jig, and avalanche terrain requires formal training and a current regional forecast that no article can replace.
