Quick Answer — How Pack Weight Guidelines Work
Your total pack weight is your base weight (everything in your pack except consumables — tent, sleeping bag, the pack itself, clothing, and gear) plus your consumables: food, water, and fuel, all of which get lighter as a trip goes on. Total Pack Weight = Base Weight + Food + Water + Fuel.
A widely cited outdoor guideline is to keep a loaded overnight backpacking pack under roughly 20% of body weight, and a day-hiking pack under roughly 10% — lighter targets (10-15%) are often recommended for hikers who want to move quickly and feel fresh at camp, while children, smaller adults, and older hikers are generally advised to aim lower still.
This guideline isn't a hard safety limit — it's a comfort and sustainability benchmark. Carrying more than the guideline percentage doesn't automatically mean a trip is unsafe, but it does mean more strain on joints and a slower, more tiring pace, particularly on technical terrain.