Ski Length Calculator
Skis that are too long turn every corner into a fight; skis that are too short chatter the moment you pick up speed. This ski length calculator starts from your height, then adjusts for your weight, ability level and ski type to give one recommended length plus a practical buying range, all in centimeters.
Recommended ski length
Practical buying range
Our recommendation
Quick Answer
For a 178 cm, 75 kg intermediate skier on all-mountain skis, this calculator recommends 173 cm, with a practical buying range of 168 to 178 cm. It starts from your height, subtracts 5 cm for the all-mountain style, keeps intermediate ability neutral, and makes no weight adjustment for a skier between 50 and 90 kg.
Key takeaways
- Start from your height in centimeters, then adjust: ski type shifts the answer by −15 to +10 cm, experience by −5 to +5 cm, weight by −5 or +5 cm.
- The calculator returns one recommended length plus a ±5 cm buying range, because skis are sold in fixed sizes.
- Carving skis run shorter for quick turns; powder skis run longer for float; all-mountain sits between them.
- This is a starting point, not a purchase order. Always check the manufacturer size chart for the specific model you buy.
How to use the calculator
Enter your height and weight, pick your ski type and your honest experience level, then click Calculate. The tool shows a recommended length, a ±5 cm buying range, and a short recommendation explaining the logic. Use Reset to return to the worked example values.
The calculator works in centimeters only, because that is how skis are sold. If you know your height in feet and inches, convert it to total inches first, then multiply by 2.54. A 5 ft 10 in skier is 70 inches, which is 177.8 cm.
The sizing logic behind the numbers
The tool applies a height-based rule with three adjustments, then rounds to the nearest centimeter. The exact formula is: recommended length = round(height + ski-type adjustment + experience adjustment + weight adjustment), and the buying range is that length ±5 cm.
The adjustments encode the same tradition ski shops use: the classic REI guidance is that ski tips should reach somewhere between your chin and the top of your head, with lighter or less experienced skiers sizing down and heavier or aggressive skiers sizing up. This tool turns that guidance into numbers you can reproduce.
Worked example
A 178 cm, 75 kg intermediate skier choosing all-mountain skis. The math: ski-type adjustment −5, experience adjustment 0, weight adjustment 0, so 178 + (−5) + 0 + 0 = 173. Rounded: 173 cm, with a buying range of 168 to 178 cm. Enter those exact inputs and the calculator returns exactly these numbers.
Change one factor and watch it move: switch the ski type to Powder and the answer becomes 188 cm (range 183 to 193), because the +10 cm float adjustment replaces the −5. Drop the experience to Beginner and it falls to 168 cm (range 163 to 173).
The chin-to-forehead body check
Before the calculator existed, ski shops sized people with a standing test: tails on the floor, tips up, and see where they reach on your body. The calculator’s numbers follow that same map, and it is still the fastest sanity check in a shop.
Chin to nose
−15 to −10 cm vs height. Beginner and carving skis. Easiest to turn.
Nose to forehead
−5 cm vs height. Intermediate and all-mountain. The balanced middle.
Forehead and above
0 to +10 cm vs height. Advanced and powder skis. Stable at speed, floats deep snow.
Weight swing
Under 50 kg sizes down 5 cm; over 90 kg sizes up 5 cm. The calculator applies it automatically.
What competing calculators miss
Most ski size tools we checked ask for height and ability, then stop. The common gaps: several popular tools ignore weight entirely (one well-known formula is just height × 0.85/0.90/0.95 by skill level), the crudest version is height minus a fixed 5 cm with no ability input at all, and the detailed chart sites make you read rows off a static table instead of combining your four factors into one number. None of them show the exact adjustment math, so you cannot tell why the answer moved when you changed an input. This page shows the full adjustment table above, and its worked example reproduces exactly in the tool: a claim the previous version of this page got wrong (it printed a 170 to 180 cm range for inputs that actually produce 173 cm).
If you are converting map or model distances rather than sizing skis, the scale length calculator handles that different job. And if you are renting on a trip, price the whole ski vacation with the cost-per-trip calculator before you commit to the gear.
Frequently asked questions
It starts from your height in centimeters, then adds three adjustments: ski type (from −15 cm for beginner skis to +10 cm for powder), experience level (−5 for beginner, 0 for intermediate, +3 for advanced, +5 for expert), and weight (−5 cm under 50 kg, +5 cm over 90 kg). The result is rounded, and you get a ±5 cm buying range around it.
The traditional shop test: stand the ski on its tail and see where the tip reaches. Chin to nose suits beginners and carving skis, nose to forehead suits intermediate all-mountain skiers, and forehead and above suits advanced and powder skiers. This calculator encodes that tradition as numbers.
Yes, by 5 cm at the extremes. Skiers under 50 kg size down 5 cm because lighter bodies need less ski to flex and control; skiers over 90 kg size up 5 cm for extra surface area and stability. Between 50 and 90 kg, weight changes nothing.
A lot: carving skis size 10 cm below your height for quick edge-to-edge turns on groomers, while powder skis size 10 cm above it for float in deep snow. All-mountain sits in the middle at 5 cm below height. For a 178 cm intermediate skier, that is the difference between 168 cm and 188 cm.
Size down if you are a beginner, ski tight trees and moguls, or want easier turns. Size up if you ski fast on open runs, weigh more than average for your height, or ski mostly powder. Then check the manufacturer’s size chart for that exact model before you buy.
The math works for any height and weight, but kids’ sizing follows different guidance: for very young skiers the tips should not reach their chins, and you should never buy skis to grow into. Talk to a ski shop for a child; use this tool for adult sizing.
No. It is a starting point that narrows your search to the right neighborhood. Sizing is not standardized between brands or even between models from the same brand, so always confirm against the specific ski’s own chart, exactly as REI recommends.
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References
- REI Co-op Expert Advice. How to Buy Skis: Types, Length and More. Accessed October 23, 2026.
- evo. Men’s Ski Size Chart. Accessed October 23, 2026.
- evo. Ski Size Chart and Calculator: How to Choose Skis. Accessed October 23, 2026.
- skis.com. How to Choose the Right Ski Length. Accessed October 23, 2026.
- Ellis Brigham. Ski Buying Guide. Accessed October 23, 2026.
- SkatePro. Buying Skis for Beginners. Accessed October 23, 2026.