DIN setting chart & calculator.

The calculator

This calculator is for skiers verifying a binding setting, ski rental staff confirming a customer's number, and anyone with a new boot or new binding who needs the ISO 11088 reference value before the shop visit.

Enter your weight, height, age band, skier type, and boot sole length (BSL, stamped on your boot heel). The output is a single reference value that maps to the ISO 11088 standard.

What DIN actually is

DIN stands for Deutsches Institut für Normung, the German standards body that originally defined the binding-release specification. The ISO took it over decades ago and the current standard is ISO 11088, but everyone still calls the number a "DIN setting." It is the release force value your binding is set to: under enough twisting or forward force, the binding will let your boot go before your knee does.

The number itself is dimensionless on the chart, but it maps to a measured release torque in Newton-meters. A DIN of 8 means the binding is calibrated to release at a specific Nm of twisting force at the toe and forward force at the heel. Higher number, higher release force, more skier control but more risk in a fall.

The chart's job is to give you a target number that balances two failure modes:

• Pre-release. Set too low. The binding releases when you don't want it to, mid-turn, at speed. You ski off the ski, fall, and tumble. Cause of a lot of broken bones.
• Failure to release. Set too high. The binding doesn't release in a fall. The ski stays attached while your body rotates around it. The classic mechanism for ACL/MCL tears, which are the most common serious ski injury.

The DIN number is a compromise between the two. The chart targets the middle.

How the calculation works

ISO 11088 reduces five inputs to a single number through a four-step process.

1. Weight code. A letter from A through M based on your weight in kg. Heavier skiers get later letters.
2. Height code. A letter from A through F based on your height. The chart compares this to the weight code and uses the more conservative of the two, protects light-tall skiers from getting a setting that's too high for their actual mass.
3. Skier type adjustment. Type 1 (cautious) leaves the code alone. Type 2 (moderate) shifts it one step toward higher DIN. Type 3 (aggressive) shifts two steps. Type 3+ (expert / racer) shifts three.
4. Age adjustment. Skiers under 10 or over 50 get one step back toward A, a more conservative number. Bones are different at the extremes of the age curve.

The final code, paired with your boot sole length bracket, gives the DIN value. Eight BSL brackets cover most adult and junior boots, from 230mm and under (small junior) up to 351mm and above (very large adult).

The reference chart

The full ISO 11088 lookup table. Find your skier code on the left, your boot sole length bracket across the top, and read the DIN value at the intersection. Empty cells mean that combination is outside the certified range, get a shop to handle it.

* Row P is extrapolated beyond ISO 11088:2023's published A-O range and applies only to race-binding territory. Codes above N are reserved for racers and very heavy advanced skiers. If your inputs land above N, you should be working with a race-certified bootfitter, not a chart on the internet.

Finding your boot sole length

Boot sole length (BSL) is the actual length of your boot, in millimeters, from heel to toe. It is the number stamped or molded on the back of the boot heel, almost always a three-digit number ending in 0 or 5. Look low on the heel block, near where the heel meets the sole.

This is not your foot length. A 27.5 mondo boot has a BSL somewhere around 308mm, different by brand and model. The number on your boot is what counts. If you can't find it, take the boot to a shop with calipers and have them measure.

Common BSLs by mondo (approximate, confirm against your specific boot):

These are typical ranges. Walk-mode touring boots, low-profile racing boots, and heavy freeride boots all vary. The number stamped on your specific boot is the only one that matters.

Picking your skier type honestly

The most-fudged input on this entire calculator. Skier type is self-reported, and most skiers classify themselves one step too high. Type 2 is a higher fraction of skiers than Type 2's marketing language suggests; Type 3 is a smaller fraction.

The honest framing:

• Type 1. You ski cautiously. You like green and easy blue runs, you control speed, you ski to enjoy the day rather than to push limits. New skiers, returning skiers, anyone who values not falling. Lower DIN. Your bindings will release more readily, this is what you want.
• Type 2. Moderate. You ski blues and easier blacks. You're comfortable at moderate speed, you don't push into terrain that worries you, you fall sometimes but rarely hard. The default for most recreational skiers.
• Type 3. Aggressive. You ski blacks and double-blacks confidently. You ski fast, you take air, you ski variable conditions and don't back off. Self-classify here only if multiple ski-buddy witnesses would agree. If your honest answer is "sometimes", you are Type 2.
• Type 3+. Racer or expert who needs higher release than Type 3 provides. Almost no recreational skier is Type 3+. If you race seriously, your race-certified bootfitter sets your number; you don't get it from a chart.

The cost of overclaiming type: a higher DIN, which means the binding doesn't release as easily in a fall. ACL tears live on the failure-to-release side of the curve. The cost of underclaiming: a lower DIN, occasional pre-release on aggressive turns. For most skiers, the second is the safer error.

Why the shop test is non-negotiable

The DIN number is a target. The binding's actual release behavior is what protects your knee. Those two things are not the same.

Bindings have moving parts: springs, cams, anti-friction devices on the toe piece, heel posts. They get dirty. They corrode. The springs lose tension over years. Anti-friction surfaces wear down. A binding set to "8" that has not been tested in three seasons might actually release at 11. Or 5. There is no way to know from looking at it.

A binding calibration test (sometimes called a Vermont Calibrator test or an ASTM test, depending on the equipment) costs $30 to $50 at most ski shops. The technician clamps your boot into a jig that loads the toe and heel with a calibrated force, and reads off the actual release value. If it matches your set DIN within tolerance, you ski. If it doesn't, the technician adjusts the binding until it does.

You should run this test:

• Once before the first ski day of every season.
• After any meaningful binding component change (new boot, new binding, mount-point shift).
• After any crash where the binding didn't release when you expected it to.
• On any binding more than five years old, every time you change the setting.

This is the part that the chart cannot replace. The number we give you is the right starting point. The shop is what makes it the actual setting.

FAQ

Can I set my own bindings?

Mechanically, yes, most modern bindings have screws on the toe and heel piece that adjust the DIN. Should you? No, not without a calibrated jig. The screw position and the actual release force are not perfectly correlated, especially as the binding ages. Setting the screw is the easy part. Confirming the binding releases at that setting is the part that requires a shop.

What DIN should a beginner use?

Typically 2 to 4 depending on weight and boot sole length. The calculator assigns skier Type 1 to beginners, which produces the lowest DIN values in the ISO 11088 lookup. The exact number depends on the four other inputs; run the calculator above with Type 1 selected.

How does body weight affect DIN setting?

Weight is the primary factor. Heavier skiers require more force to control the ski and receive higher DIN values. A skier weighing 95 kg typically receives a DIN 2 to 3 points higher than a skier of the same height and ability weighing 60 kg.

What happens if my DIN setting is too high?

The binding does not release when the force in a fall is below the set value. The ski stays attached while the body rotates around it. This is the classic mechanism for ACL tears and tibial fractures and the more dangerous of the two failure modes.

What happens if my DIN setting is too low?

The binding releases too easily during normal skiing, called a pre-release. Pre-releases happen on hard turns, in bumps, or at speed. The skier loses both skis, falls, and can break bones in the tumble. Less common than failure-to-release injuries but still serious.

Do DIN values differ between binding brands?

No. The DIN scale is standardized under ISO 11088. A setting of 6 on Marker is the same release force as 6 on Salomon, Look, or Tyrolia. The physical adjustment mechanism differs between models, which is why a binding tester verifies the actual release torque after any setting change.

What's the difference between a DIN setting and a Z-value?

Same thing. Z is the symbol used on the indicator window of most bindings. DIN is the standard the Z value is set against. When someone says "my Z is 8," they mean their DIN is 8.

What if my calculated DIN is below 0.75 or above 12?

You're outside the certified range for adult bindings on a recreational chart. Below 0.75: usually a small junior who needs a junior-specific binding. Above 12: race binding territory, set by a race technician, not from a chart. Either way, get to a shop.

Should I lower my DIN as I get older?

The age band on this calculator handles that, over 50 gets one step toward more conservative settings. Past 65, talk to a bootfitter; bone density and reaction time both factor in beyond what the standard chart accounts for.

Why do my bindings have a higher DIN range than my number?

Bindings are sold in DIN ranges (e.g. 4-13, 6-15) and your specific setting sits within that range. A recreational skier with a DIN of 7 has plenty of headroom on a 4-13 binding. Don't buy a binding rated higher than you need; the lighter recreational bindings actually have a smoother release curve in the middle of their range than the heavy race bindings have at the bottom of theirs.

How often should I have my bindings serviced?

Annually before the first ski day. The ASTM-recommended schedule is annual binding inspection and release-value verification. Most ski shops include this in their tune package; expect $30 to $80 depending on whether you also need a base/edge tune.

Is there a women's-specific DIN chart?

No. The chart uses weight, height, age, skill, and BSL, none of which are gendered. The chart works the same for everyone.

What about touring bindings?

Tech-style touring bindings (Dynafit, Marker Alpinist, etc.) have their own release-value systems. Some are DIN-certified and use the same chart; many are not, and the manufacturer publishes its own setting recommendations. If you tour, work with a shop that specializes in backcountry, resort-shop technicians often don't service touring bindings to the same calibration standard.