By Dana Okoro, Editorial Reviewer · Published September 14, 2026, 6:03 PM ET
Direct Answer
A child should generally carry less than the roughly 20% adult guideline: many outdoor-education programs suggest under 10% of body weight for kids around 4-6, 10-15% for ages 7-10, and up to 15-20% for capable pre-teens and teens, adjusted for fitness and terrain.
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In plain English
Kids can carry some of their own gear, and most enjoy having a pack of their own. The question is how much. The simplest guide is a percentage of the child's body weight. For a child who weighs 60 pounds, 15% works out to 9 pounds, which is about a full water bottle, a jacket, a snack and a small first-aid kit.
Different experts give slightly different numbers, and most of that advice was written for school backpacks rather than hiking, so treat any number as a ceiling, not a goal. A pack with two padded shoulder straps and a waist belt spreads the weight better than one strap over one shoulder. The best test is watching your child walk. If they lean forward, change how they walk, or keep asking to stop, take some weight out, no matter what the math says.
These figures are guidelines, not hard limits, and they scale with a child's age, fitness, hiking experience and the specific trip's terrain and length.
Load guidelines by age
Age
Suggested load
Notes
Under 4
None — rides in a child carrier
Not carrying independently yet
4-6
Under 10% of body weight
Often just water and a comfort item
7-10
10-15% of body weight
A real share of the ten essentials
11-13
15%, up toward 20% if experienced
Daypack or light overnight loads
Teens (14+)
Approaching the adult ~20% guideline
Full share of overnight gear as fitness allows
Why the percentage is lower for kids
A child's proportionally smaller frame and still-developing joints and posture make them more sensitive to overload than an adult carrying the same relative percentage, which is why outdoor-education guidance sets the ceiling lower for younger kids and raises it gradually with age and experience. A hipbelt still helps at any age once a pack carries real weight, transferring a share of the load off the shoulders the same way it does on an adult pack, so a framed kids' or youth pack with a hipbelt can comfortably carry more than a beltless daypack of the same weight.
What pushes the safe number up or down
Trip length, elevation gain, terrain difficulty and how much water needs to be carried all shift a child's comfortable load within their age band. A short, flat trail lets a child carry toward the top of their range comfortably; a long, steep or hot trip calls for staying toward the bottom, since fatigue and heat compound faster in kids than in adults.
A practical way to apply the guideline
Rather than calculating an exact percentage before every trip, it's more practical to load a kids' or youth pack, have the child wear it around the house or yard, and watch for signs of strain — hunching, an altered gait, or complaining after a short walk. Those signs mean the pack is too heavy regardless of what the percentage math suggested, and the load should come down before the trip rather than after it starts.
What the published guidance actually says
The American Academy of Pediatrics advises that a child's backpack weigh no more than 15% of body weight, and that children use both shoulder straps.1 Nemours KidsHealth gives a wider 10 to 20% range.2 The UK National Back Pain Association concluded in 1997 that students should carry no more than 10%,3 and a 2022 narrative review of backpack research says a child's total load should not exceed 10% of body mass.4
Almost all of this guidance comes from research on school backpacks. No hiking-specific children's load standard appears in this site's research library, and the existing page's age table, which climbs toward the adult 20% figure for teens, isn't traceable to a specific published source. The AAP's 15% ceiling is the most authoritative single number available, and staying below it is the conservative choice at any age covered by that guidance.
Why the numbers disagree
The research itself is mixed. In one study of students, 75% carried more than 10% of their body weight and 17% carried more than 20%, and the authors suggested even the 20% upper bound may be too high for younger children.5 A study of 8 to 10 year olds found no significant correlation between backpack weight or type and pressure pain threshold.6 A 500-student study found children carried an average of 13.53% of body weight.3
The adult 20% figure the page compares against has its own problems. It's a hiking-community rule of thumb without a primary research source. Deuter says people can carry a maximum of 20 to 25% of body weight,7 and Appalachian Trail backpackers in one study actually carried about 25 to 28%.8 Scaling a loose adult rule down for children adds guesswork on top of guesswork, which is why a child-specific ceiling is the better anchor.
Turning percentages into real gear
Deuter skips percentages and gives weights: preschoolers no more than 1 kg, elementary-school kids up to 3 kg, under-12s no more than 4 to 5 kg, and teens up to 16 no more than 7 kg.9 It also sizes packs by age: no more than 5 liters for ages 1 to 3, 11 to 22 liters for school-aged kids, and 30 liters or more for some kids 8 and up depending on height.9
Water is the item that tips the balance. A liter of water has a mass of about a kilogram,10 so a single full liter bottle meets Deuter's entire preschool limit. That's why adults usually carry most of the family's water. A waist belt helps spread weight more evenly, and a child's pack should rest in the middle of the back rather than sagging toward the buttocks.2
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