How to Pack a Rucksack: Weight Distribution That Works
Two people can carry the same rucksack with the same gear and have completely different experiences, purely down to how it was packed. A badly loaded pack throws your balance off, drags on your shoulders, and makes every descent feel unstable; a well-packed one feels like it's part of you. The good news is that packing well is mostly a matter of following a fairly simple layering principle, not buying different gear.
The core principle: heavy, centred, close to your back
The single most important rule of rucksack packing is that heavy items belong close to your back and centred vertically — roughly between your shoulder blades and the small of your back, not down at the bottom of the pack and not right at the top. Weight carried close to your spine and your body's centre of gravity is weight your body barely notices; weight carried low, high, or away from your back leverages against you with every step, making the pack feel far heavier than it actually is and pulling you off balance on uneven ground.
This means your heaviest items — food bag, stove and fuel, water reservoir, cooking gear — should sit in the middle of the pack, pressed toward the back panel. It's a common instinct to bury heavy things at the bottom "to keep the pack stable," but this actually does the opposite: it drops your centre of gravity too low and pulls the whole load backward and down, straining your lower back rather than letting your hips take the weight.
The bottom: bulky, light, compressible
The base of the pack is the right place for bulky but light items that you won't need until camp — most obviously your sleeping bag, which is why most rucksacks have a dedicated bottom compartment or at least a base section suited to it. Add a spare insulated layer or anything else soft, compressible and not needed during the day. This gives the pack a stable, cushioned foundation without adding meaningful weight low down.
The middle: your heaviest gear
Directly above the base and pressed against your back panel is where the heavy items from the core principle above actually go: food, stove, fuel canister, cook pot, water. Pack these snugly with no gaps, using smaller soft items (spare clothing, a stuff sack of socks) to fill voids and stop things shifting around as you walk — a load that moves inside the pack is almost as uncomfortable as one that's badly positioned to begin with.
The top and pockets: what you need on the move
The top of the pack, the lid pocket, and any side or hip-belt pockets are for anything you might need without a full unpack: waterproof jacket, map and compass, snacks, sun cream, headtorch, first aid kit. If the weather turns or you need a snack, you want these within seconds' reach, not buried under your sleeping bag. Many packs also have side compression straps or external attachment points — useful for trekking poles, a foam sit-mat, or a tent that you want fast access to, but best avoided for anything genuinely heavy, since external weight swinging loose undoes a lot of the careful centring you've done inside the pack.
Keeping it balanced side to side
Front-to-back positioning is only half the job — side-to-side balance matters just as much and is easier to get wrong without noticing. A pack that's heavier on one side will pull you subtly off-centre all day, tiring one set of muscles more than the other and becoming genuinely uncomfortable over distance. Pair up items of similar weight (two water bottles rather than one large one plus something light) and place them symmetrically, and once loaded, pick the pack up and check by feel whether it leans to one side before you set off.
Finally, use the compression straps most packs have along the sides and top — cinching these down after packing pulls the load in close and stops gear shifting as you move, which keeps your careful weight distribution from unravelling on the first descent. A pack that's well packed but not compressed will still feel loose and unpredictable on uneven terrain.
The bottom line
Sleeping bag and light bulky gear at the bottom, heavy items centred in the middle close to your back, quick-access items at the top and in the pockets, and a genuine effort to balance left and right — that's the whole system. It takes a few extra minutes at the trailhead and makes a very real difference to how the miles feel underfoot.