Cross-Country Ski Length Calculator
Classic and skate ski sizes from height.
What it does
Classic and skate skis split by job. Classic runs long for glide and grip in tracks, while skate runs short for edge power in open lanes. Height sets the baseline with about 30 cm between the pair.
The tool above adds 20 cm for classic and subtracts 10 cm for skate. At 175 cm that gives 195 cm classic with 165 cm skate. At 160 cm it gives 180 cm with 150 cm. The imperial mirror at 69 in gives 76.9 in classic with 65.1 in skate.
Weight and skill bend the baseline. Heavy skiers float better a size up, while light or new skiers control a size down more easily. Shops stock 5 cm steps, so the exact math rounds to the nearest shelf length.
This page sizes recreational touring skis only. It does not fit backcountry, jumping, or racing stock, nor boots and poles. Confirm flex with body weight before buying.
How to use
- Pick metric (cm) or imperial (in).
- Enter the skier height.
- Read classic length first.
- Read skate length.
- Round to stocked 5 cm steps.
- Adjust a size for weight and skill.
Formula
- height
- Skier height in cm (converted from inches when imperial).
- classic
- Long striding ski for set tracks.
- skate
- Shorter edge ski for skate lanes.
Recreational touring baseline with a fixed 30 cm gap. At very short or tall heights stock sizes step in 5 cm jumps, so round to the nearest stocked length. Weight and skill move the pick a size.
Worked example
Example: 175 cm skier
Defaults: metric 175 cm. Imperial mirror is 69 in. Weight and skill shift a size.
- Inputs (metric default): 175 cm tall.
- Classic: 175 plus 20 is 195 cm classic.
- Skate: 175 minus 10 is 165 cm skate.
- Gap: 30 cm apart by construction.
- Imperial mirror (69 in) gives 76.9 in classic with 65.1 in skate. Tool shows the same.
Reference table
| Height | Classic | Skate |
|---|---|---|
| 175 cm | 195 cm classic | 165 cm skate |
| 160 cm | 180 cm classic | 150 cm skate |
| 69 in | 76.9 in classic | 65.1 in skate |
| 70 in | 77.9 in classic | 66.1 in skate |
| 180 cm | 200 cm classic | 170 cm skate |
Limits
- Touring baseline. Race and backcountry differ.
- One formula. Camber needs flex testing.
- Stock steps. Exact math rounds.
- No boots, bindings, or poles.
Common mistakes
- Buying classic length for skating.
- Ignoring weight on soft snow.
- Rounding up when control matters.
- Using alpine height rules.
- Skipping flex testing at the shop.
Try it yourself
Quick checks. Answers sit tucked under each question.
160 cm tall?
Classic is 180 cm with skate 150 cm. Gap is 30 cm apart.
70 in tall?
Classic is 77.9 in with skate 66.1 in. Gap is 11.8 in apart.
Questions
How are ski sizes figured?
Classic near height plus 20 cm, skate near height minus 10 cm. Here 195 cm classic with 165 cm skate.
Why is classic longer?
Classic glides in tracks needing length; skate pushes edge to edge wanting control.
Does weight matter?
Yes. Heavy skiers size up for float, light or new skiers size down for control.
What if I am new?
Beginners often drop 5 cm from classic for easier turning.
Does this cover touring skis?
No. Backcountry and metal edge skis follow their own charts.
Is length the whole fit?
Yes. Boots, bindings, and poles need fitting too.