Edge Bevel Angle Calculator
Created by: Daniel Hayes
Last updated:
Compare current ski edge angles with documented HEAD or Atomic product specifications while keeping side-edge and side-bevel notation explicit.
Edge Bevel Angle Calculator
Snow SportsNamed HEAD and Atomic specifications • explicit angle notation
What does this edge bevel angle calculator show?
An edge bevel angle calculator translates and compares two common notations without confusing them. Base bevel is measured up from the base plane. A side edge may be written as an inside angle such as 87° or as a bevel away from square such as 3°. Those two side descriptions represent the same geometry because 90° minus 87° equals 3°.
This tool provides three tightly scoped references: the HEAD production standard described in its 2023/24 rental technical manual, the official Atomic Backland 65 UL specification, and the official Atomic Maverick J 100–120 specification. It does not call those values universal recommendations or transfer a junior, rental or touring specification to another ski.
Optional current measurements let a user record a comparison. A difference of 0.2° is simply arithmetic between the entered and source values; it is not an instruction to file 0.2° away. Existing edges may have prior work, wear, burrs or measurement uncertainty. Removing material is not reversible in the way editing a calculator input is.
Swix’s Multi Edger documentation supports the distinction between base and side adjustment ranges and says the base edge is set before the side edge. That tool information does not prescribe which setting belongs on every ski. The selected model’s own specification remains the reference, and the physical equipment still needs inspection.
The output deliberately avoids a tuning-frequency estimate. Timing belongs in the separate tune interval planner and is based on a user-entered schedule plus inspection flags. Angle and timing answer different questions: one records geometry, while the other tracks a maintenance checkpoint.
Angles are specification references, not instructions to remove material. Confirm the exact ski and have uncertain, damaged or previously tuned edges inspected by a qualified shop.
Method and calculation
The source profile supplies a base bevel and a side-edge inside angle. The equivalent side bevel is calculated as 90° minus the side-edge angle. This normalization makes 88° side edge readable as 2° side bevel and 87° readable as 3° without pretending they are four independent settings.
When current angles are entered, the table subtracts each source target from the comparable current measurement. Blank measurements remain unknown. The model rejects nonfinite and geometrically invalid values, keeping side-edge notation below 90° and preventing a missing value from becoming a zero-degree bevel.
Charts show only the two small bevel values, because plotting an 87° inside angle beside a 1° base bevel would obscure the useful comparison. The table retains both source notations and current differences so the display does not hide how the normalized chart was produced.
Formula or lookup rule
side bevel = 90° − side-edge inside angle; difference = current measurement − source specification
- Identify the exact reference: Choose the manufacturer and named product or documented production standard.
- Enter measured angles if known: Keep base bevel and side-edge inside-angle notation in their labeled fields.
- Compare without filing: Use the arithmetic record to discuss inspection and service with a qualified technician.
Worked examples
HEAD production notation
The HEAD manual describes 1° on the base and approximately 2° laterally. The calculator displays the equivalent 88° side-edge inside angle. That translation helps compare tools labeled in different conventions but does not broaden the manual to every HEAD ski year or condition.
Atomic Backland profile
The named Backland 65 UL product lists 0.8° base and 87° side-edge angles. The normalized side bevel is 3°. If a current side-edge measurement is 88°, the one-degree difference is recorded without telling the user how much material to remove.
Unknown current tune
When both current fields are blank, source targets still display and the difference cells say not entered. That is more accurate than assuming factory condition. A shop measurement can establish the actual geometry and whether service is appropriate.
Practical applications
- Pre-season records: Create a dated baseline before equipment is used, preserving the exact product, measurement method, units and source so a later comparison has meaningful context.
- Shop conversations: Bring a transparent result and its assumptions to a qualified shop. The output organizes questions; it does not replace inspection, manufacturer instructions or hands-on fitting.
- Household equipment logs: Keep different skis, boards and riders separate. Reusing a number without its model, date and measurement basis can make an otherwise correct calculation misleading.
- Scenario comparison: Change one documented input at a time and recalculate. The table and chart expose the effect without pretending that a modeled alternative has been physically tested.
- Purchase preparation: Identify missing specifications before ordering products or service. An unsupported or blank result is useful when it prevents an unjustified compatibility or performance claim.
- Handoff notes: Export the result with its limitations when another parent, rider or technician will review the equipment, then confirm that the source still applies to the exact item.
Tips for useful results
Write down whether a tool or technician reports side bevel from square or the inside side-edge angle. A value of 2° and a value of 88° can describe the same geometry, while entering both as bevel values would produce a serious misunderstanding.
Confirm the model and year before comparing. Inspect for loose or damaged edges and exposed core, and avoid treating a specification match as an equipment-condition approval. Machine work, past hand tuning and measurement technique can all affect the current physical angle.
Frequently asked questions
Is this edge-angle comparison a safety or fit certification?
No. It is a planning and record-keeping result within the stated source and inputs. It cannot inspect materials, verify hardware, diagnose damage, predict performance or certify fit. Follow the exact equipment instructions and use a qualified technician or fitter whenever the decision depends on physical condition, compatibility or adjustment decisions.
Why does the calculator sometimes preserve more than one answer?
Published ranges and entered position lists can overlap. Keeping every supported match is more faithful than forcing one convenient winner. Review the product labels, exact equipment and conditions, then make the practical selection with the applicable manufacturer guidance. A calculator should expose ambiguity rather than conceal it with unsupported rounding.
What happens when a required value is unknown?
Leave optional measured fields blank and obtain required specifications before relying on a comparison. The tool does not convert blank values to zero. When the selected source has no supported result, it returns that limitation instead of clamping to an endpoint, extrapolating a chart or silently borrowing a rule from another brand.
Should I round measurements before entering them?
Use the original measured value and the unit shown. The model converts canonical units before comparison and rounds only the displayed result. Early rounding can move a value across an inclusive endpoint or discrete check boundary. Record how and where the measurement was taken so another person can reproduce it.
Can I reuse this result next season?
Treat it as a dated record, not a permanent answer. Products, instructions, conditions, service history and a child’s measurements can change. Recheck the current manufacturer source, inspect the equipment and repeat the measurements before reuse. An old export is most valuable as a comparison point with its assumptions still attached.
Why are the source limits repeated in the result?
The number is easy to detach from the method when it is shared or exported. Repeating the product line, units, exclusions and verification step helps prevent that misuse. It also makes clear which parts came from a manufacturer and which parts—such as an interval or range—were supplied by the user.
Sources and references
- HEAD: Rental Solutions Technical Manual 2023/24. 2023/24. Section: Tuning, page 73. Accessed 2026-09-09. HEAD production standard: 1.0° base bevel and approximately 2° side bevel. Damage and maintenance inspection table is used only as an inspection prompt.
- Atomic: Backland 65 UL. 2025/26. Section: Base Edge Angle and Side Edge Angle specifications. Accessed 2026-09-09. Backland 65 UL only: 0.8° base edge and 87° side edge.
- Atomic: Maverick J 100–120 + C 5 GW. 2025/26. Section: Base Edge Angle and Side Edge Angle specifications. Accessed 2026-09-09. Maverick J 100–120 only: 1.3° base edge and 87° side edge.
- Swix: Multi Edger. Current product guide inspected 2026-09-09. Section: Product information and supported angle ranges. Accessed 2026-09-09. Defines base- and side-bevel conventions and tool ranges; it does not prescribe an angle for every skier or product.