Ski binding setup · ISO 11088 reference
Ski DIN Calculator
Find your ski binding DIN setting from the ISO 11088 release-value chart. Enter your weight, height, age, skier type, and boot sole length — the calculator runs the exact shop procedure step by step and shows your reference DIN, the torque it represents, and how to check forward pressure.
Scope boundary: this tool sets binding release values (the DIN number in the toe/heel windows). It does not choose ski length, binding model, or mount position.
ft = decimal feet, e.g. 5.75 for 5′9″.
9 & under / 50 & over shift one row safer.
Stamped on the boot heel — not your shoe size.
- Incorrect settings can cause serious knee injury — too high fails to release, too low pre-releases.
- Re-check every season, after any hard crash, and with new boots or bindings.
- If your result is below 0.75 or above 12, you are outside the recreational range — see a shop.
What is a DIN setting?
DIN stands for Deutsches Institut für Normung, the German standards body that originally defined the binding-release specification. The standard has long since moved to ISO — the current document is ISO 11088, covering assembly, adjustment, and inspection of the alpine ski-binding-boot system — but everyone still calls the number a “DIN setting.”
The number in the little window on your toe piece and heel piece is a release value. Below a certain twisting force (measured at the toe, in newton-meters) and forward-lean force (at the heel), the binding holds your boot. Above it, the binding lets go — ideally before your knee becomes the weak link. A higher DIN means the binding holds on through bigger forces; a lower DIN means it releases sooner.
The chart’s job is to balance two failure modes. Pre-release (set too low): the ski pops off mid-turn at speed and you tumble — broken collarbones live here. Failure to release (set too high): the ski stays on while your body rotates around it in a fall — the classic mechanism for ACL and MCL tears, the most common serious ski injuries. The ISO 11088 procedure targets the middle of that trade-off for your body and your skiing, and this calculator follows that procedure exactly.
How the ISO 11088 calculation works
The standard reduces five inputs to one number in a fixed sequence. The calculator above shows every step for your inputs:
- Weight code. Your weight picks a skier code letter from A (lightest) to M. Weight is the primary driver — heavier skiers need more force to control the ski.
- Height code. Your height picks a code letter too (rows H–M). If weight and height point to different letters, the code closer to the top of the chart wins — this protects tall, light skiers from a setting built for their height instead of their mass.
- Skier-type shift. Type 1− moves one row up (safer), Type 1 stays, Type 2 moves one row down, Type 3 two rows down, Type 3+ three rows down. Down the chart means a higher DIN. Small skiers get caps: under 48 lbs the shift is limited to one row, and at 29 lbs and under no correction applies at all.
- Age shift. Skiers aged 9 and under, or 50 and over, move one row back toward the top — a built-in conservative step for the ends of the age curve.
- Boot sole column. Your boot sole length (BSL) picks one of six columns. Shorter boots get higher DIN numbers for the same code, because a shorter boot is a shorter lever. If the intersection is an empty cell, the procedure moves right along the row to the first listed value; an exhausted row means the combination is outside the certified range.
ISO 11088 reference table
Find your skier code on the left, your boot sole length across the top. The twist / forward-lean columns show the reference release torque in newton-meters that each DIN number represents. Empty cells are outside the certified range for that combination.
| Code | Twist Mz (Nm) | Fwd lean My (Nm) | <250 mm | 251-270 mm | 271-290 mm | 291-310 mm | 311-330 mm | >331 mm |
|---|---|---|---|---|---|---|---|---|
| A | 8 | 29 | 0.75 | 0.75 | — | — | — | — |
| B | 11 | 40 | 1 | 1 | 0.75 | — | — | — |
| C | 14 | 52 | 1.5 | 1.25 | 1 | — | — | — |
| D | 17 | 64 | 1.75 | 1.5 | 1.5 | 1.25 | — | — |
| E | 20 | 75 | 2.25 | 2 | 1.75 | 1.5 | 1.5 | — |
| F | 23 | 87 | 2.75 | 2.5 | 2.25 | 2 | 1.75 | 1.75 |
| G | 27 | 102 | 3.5 | 3 | 2.75 | 2.5 | 2.25 | 2 |
| H | 31 | 120 | — | 3.5 | 3 | 3 | 2.75 | 2.5 |
| I | 37 | 141 | — | 4.5 | 4 | 3.5 | 3.5 | 3 |
| J | 43 | 165 | — | 5.5 | 5 | 4.5 | 4 | 3.5 |
| K | 50 | 194 | — | 6.5 | 6 | 5.5 | 5 | 4.5 |
| L | 58 | 229 | — | 7.5 | 7 | 6.5 | 6 | 5.5 |
| M | 67 | 271 | — | — | 8.5 | 8 | 7 | 6.5 |
| N | 78 | 320 | — | — | 10 | 9.5 | 8.5 | 8 |
| O | 91 | 380 | — | — | 11.5 | 11 | 10 | 9.5 |
| P | 105 | 452 | — | — | — | 13 | 12 | 11.5 |
Worked examples
Example 1 — the textbook case: DIN 6
- Weight 70 kg → code K (67–78 kg). Height 170 cm → code K (167–178 cm). Base code: K.
- Type 2 (moderate) → shift +1 → L. Age 30 → no age shift.
- Boot sole 315 mm → column 311–330. Row L in that column → 6.
Reference DIN: 6 · ≈ 58 Nm twist / 229 Nm forward lean.
Example 2 — senior skier: DIN 3
- Weight 55 kg → code I (49–57 kg). Height 165 cm → code J (158–166 cm). Codes differ → closer to top wins: I.
- Type 1 (cautious) → no shift. Age 55 → one row toward the top → H.
- Boot sole 295 mm → column 291–310. Row H in that column → 3.
Reference DIN: 3 · ≈ 31 Nm twist / 120 Nm forward lean.
Example 3 — young junior: DIN 1.5
- Weight 30 kg → code E (26–30 kg). Height 140 cm → code H (under 148 cm). Closer to top wins: E.
- Type 1 → no shift. Age 8 → one row toward the top → D.
- Boot sole 260 mm → column 251–270. Row D in that column → 1.5.
Reference DIN: 1.5 · ≈ 17 Nm twist / 64 Nm forward lean.
Finding your boot sole length
Boot sole length (BSL) is the full length of the boot from heel to toe in millimeters — the three-digit number stamped or molded low on the back of the heel block, usually ending in 0 or 5. It is not your mondo point size (27.5) and not your foot length. Typical BSLs by mondo size are approximate — the number on your boot is the only one that counts:
| Mondo | Typical BSL | Chart column |
|---|---|---|
| 23.5 | ~268 mm | 251–270 |
| 25.0 | ~285 mm | 271–290 |
| 26.5 | ~298 mm | 291–310 |
| 27.5 | ~308 mm | 291–310 |
| 28.5 | ~318 mm | 311–330 |
| 29.5 | ~328 mm | 311–330 |
Walk-mode touring boots, low-profile race boots, and heavy freeride boots all vary from these typicals. If you cannot find the stamping, a shop can measure the boot with calipers in seconds.
Picking your skier type honestly
Skier type is the most-fudged input on the chart, and it is self-reported — most intermediates classify themselves one step too high. The honest framing:
- Type 1− / 1 (cautious): you ski to enjoy the day, control speed, prefer greens and easy blues. Lower DIN, easier release — what you want.
- Type 2 (moderate): blues and easier blacks at moderate speed, comfortable but not pushing terrain that worries you. The default for most recreational skiers.
- Type 3 (aggressive): fast on blacks, variable conditions, take air — and your ski buddies would agree. If your honest answer is “sometimes,” you are Type 2.
- Type 3+ (expert / racer): almost no recreational skier is here. If you race, your bootfitter sets the number, not a chart.
The cost of overclaiming is a higher DIN — the binding holds on in a fall. The cost of underclaiming is an occasional pre-release. For most skiers, the second error is the safer one.
Forward pressure: the setting most skiers skip
The DIN number is meaningless without correct forward pressure — how firmly the heel piece drives the boot forward into the toe piece. Set the DIN first, click the boot in, then check the indicator. Every brand does it differently:
- Look / Rossignol: center the indicator needle inside the small window on the heel.
- Salomon / Atomic / Marker: turn the heel adjustment screw until it sits flush with the housing.
- Tyrolia: center the metal adjustment tab between the scribed lines.
- Look Pivot: the white tab under the heel piece must sit centered on its line (adjusted via the two screws on the heel arms).
On flat-mounted bindings your new boot’s BSL must be within about ±10 mm of the old one or the binding needs a remount; rail and demo bindings adjust freely along the track. Recheck forward pressure every season — it drifts as boot soles wear.
What binding DIN range should you buy?
Bindings are sold in DIN ranges — 4–13, 6–16, 8–18. Your reference DIN should sit near the middle of the range, not at either extreme: release curves are smoothest mid-range, and a heavy race binding run at the bottom of its range releases more harshly than a recreational binding run in the middle of its. A DIN-7 recreational skier belongs on a 4–13 binding, not an 8–18 “for later.”
A note on chart editions
ISO 11088 has been revised over the years — the current edition is 2023 — and shop wall charts are printed from different editions with slightly different boot-length brackets. Values for the same skier can differ by about half a DIN step between printings. This calculator uses the classic shop-chart printing used by the major binding makers (Marker, Salomon, Look, Dynastar). Treat any chart number as a reference: the shop’s calibrated tester has the final word.
DIN calculator FAQ
What is a DIN setting on ski bindings?
DIN (from Deutsches Institut für Normung, the German standards body that first defined it) is the release-force number on your ski bindings, now standardized internationally as ISO 11088. It sets how much twisting force at the toe and forward force at the heel it takes for your boot to release from the ski. A higher number holds on longer; a lower number lets go sooner. The scale is identical across brands, so DIN 6 on one binding equals DIN 6 on another.
How is my DIN setting calculated?
Five inputs run through the fixed ISO 11088 procedure: (1) your weight picks a skier code letter, (2) your height picks a code letter and the code closer to the top of the chart wins, (3) your skier type shifts the code up or down, (4) skiers aged 9 and under or 50 and over shift one row toward the safer end, (5) your boot sole length picks a column. The number where the final row and column meet is your reference DIN. The calculator above runs exactly these steps and shows each one.
What do skier types 1, 2, 3 and 3+ mean?
Skier type describes how you ski, not how good you are. Type 1−/1 is cautious: slower speeds, gentle terrain, prefers easy release. Type 2 is moderate: comfortable on blues and easier blacks at moderate speed — the default for most recreational skiers. Type 3 is aggressive: fast on steep, variable terrain. Type 3+ is racer or expert needing more retention than Type 3. Most skiers who call themselves Type 3 are really Type 2; overclaiming raises your DIN and your injury risk.
Why does a longer boot sole get a lower DIN value?
Leverage. A longer boot is a longer lever arm, so the same spring produces more torque at the binding. To keep the actual release force constant, the chart assigns a lower DIN number to longer boots. That is why you must use the number stamped on your boot heel (boot sole length in millimeters), not your shoe size or mondo point size.
What happens if my DIN is set too high?
The binding fails to release in a fall. The ski stays attached while your body twists around it — the classic mechanism for ACL and MCL tears and tibial fractures, the most common serious ski injuries. Too high is the more dangerous direction, which is why honest skier-type selection and the age adjustment exist.
What happens if my DIN is set too low?
The binding pre-releases: it lets go during hard turns, in bumps, or at speed when nothing is wrong. You lose a ski mid-turn, fall, and tumble — a common cause of broken collarbones and wrists. If your skis pop off while you are skiing normally (not falling), tell the shop; the setting may be too low for your skiing.
Should older skiers use a lower DIN?
Yes. The ISO 11088 procedure moves skiers aged 50 and over one row toward the lower end of the chart, and does the same for skiers aged 9 and under. Bones and reaction time change at the ends of the age curve, so the standard builds in a conservative step. Past 65, discuss the setting directly with a bootfitter rather than relying on the chart alone.
Can I adjust my own bindings with this number?
You can turn the screws, but do not treat that as finished. The screw position and the actual release force drift apart as bindings age, get dirty, or wear — a binding showing 8 can release at 11 or 5. A certified technician sets the number, checks forward pressure, then verifies real release torque on a calibrated tester. Use this calculator to learn your reference number; let the shop make it real.
Is a DIN of 6 the same on every binding brand?
Yes. The scale is standardized under ISO 11088, so 6 means the same target release force on Marker, Salomon, Look, Tyrolia, and others. The Z in the indicator window is the same thing: “my Z is 8” means “my DIN is 8”. What differs between brands is the physical adjustment mechanism and how forward pressure is checked, not the number itself.
What is forward pressure and how do I check it?
Forward pressure is how firmly the heel piece pushes the boot forward into the toe piece — without it, the release values are meaningless. With the boot clicked in: on Look and Rossignol bindings center the indicator needle in its window; on Salomon, Atomic, and Marker turn the heel screw until it sits flush with the housing; on Tyrolia center the metal tab between the lines; on the Look Pivot the white tab under the heel must sit centered on its line. Check it every season, because it drifts as boots wear.
How often should bindings be inspected?
At the start of every season, after any crash where the binding did not release as expected, and whenever you change boots or bindings. Springs lose tension, anti-friction devices wear, and housings corrode. A calibration check on a tester costs roughly $30 to $50 and is the only way to confirm the number in the window matches reality.
What binding DIN range should I buy?
Bindings are sold in ranges like 4–13 or 6–16. Your reference DIN should fall near the middle of the range, not at either extreme — release curves are smoothest mid-range. A recreational skier at DIN 7 is well served by a 4–13 binding; buying an 8–18 race binding “for later” gives a harsher release at the bottom of its range.
What if my result is below 0.75 or above 12?
You are outside the certified recreational range. Below 0.75 usually means a small junior who needs a junior-specific binding. Above 12 is race-binding territory, set by a race technician with a tester — not from a chart. Either way, this calculator has done its job by telling you to see a shop.
Why do some DIN charts show slightly different numbers?
The ISO 11088 standard has been revised over the years (the current edition is 2023), and shop wall charts are printed from different editions — values for the same skier can differ by about half a DIN step between printings. This calculator uses the classic shop-chart printing used by the major binding makers. Treat any chart number as a reference and let the shop’s calibrated tester have the final word.
Free tool by NRTechStudio