Ski pole weight ranges from about 180g to 600g per pair, and it definitely matters—especially over a full day on the mountain. Lighter poles reduce arm fatigue and make pole planting quicker and smoother. Most aluminum poles fall in the 400-550g range, which is comfortable for recreational resort skiing. Carbon poles are lighter, typically 180-350g, and are popular for touring and racing where every gram counts on the ascent.
That said, lighter isn't always better. Poles under 250g can feel flimsy or lack the satisfying "plant" feel many skiers prefer. Ultra-light poles also sacrifice durability, so if you're hard on gear or ski mostly inbounds, a mid-weight option around 350-450g often hits the sweet spot between comfort and toughness.
For touring or racing, go as light as your budget allows. For casual resort skiing, aim for under 450g and you'll be comfortable all day without overspending on weight you won't notice.