Ski Wax Selection Calculator

Nordic and alpine skis need a wax whose hardness matches the snow's crystal structure, and this calculator translates snow temperature, humidity, and snow type into that match. Colder, drier snow is more abrasive and calls for a harder wax (rated 1 softest to 5 hardest here); this tool starts from snow temperature thresholds — below -15°C pushes toward the hardest rating, above 0°C toward the softest — then nudges the result: humidity above 70% softens the recommendation by one step because moist snow needs a wax that sheds water rather than grips ice crystals, while artificial (man-made) snow bumps hardness up a step because its rounder, denser crystals wear soft wax quickly. Old or transformed snow gets the same bump only when it's also below -2°C, reflecting how transformed snow re-freezes into an abrasive crust.

From the hardness rating the calculator derives a suggested iron temperature (110°C for the softest wax up to 150°C for the hardest) and how many coats to apply — two in typical conditions, rising to three below -10°C and capping at four on artificial snow, since colder and more abrasive conditions burn through a thin layer faster. The wax temperature range (shown as an encoded low/high pair) narrows as conditions get colder, since cold-weather waxes are formulated for a tighter window. None of this replaces reading a wax manufacturer's own chart — brands vary — but it's a solid starting point when you don't have one handy.