Packing to 15% of Your Body Weight: A Practical Guide
Pack-weight advice is full of vague reassurance — "pack light," "you don't need that much" — without ever saying what "light" actually means in kilograms. The rule that does give you a real number is rating your loaded pack against your own body weight, and it's worth understanding both why it works and how to actually hit it.
Why body weight, not a flat number
A flat target like "aim for 10kg" ignores the person carrying it. A 10kg pack is a non-event for someone who weighs 90kg and a genuine burden for someone who weighs 50kg. Rating pack weight as a percentage of body weight scales the guidance to the actual person, which is why it's the standard backpacking rule of thumb rather than a fixed number.
The rough bands
Under 10% of body weight is considered ultralight and barely noticeable over a full day. 10–15% is a comfortable, sustainable load for multi-day travel. 15–20% is still workable but you'll feel it by the end of a long day. 20–25% starts to wear on knees, hips, and shoulders over consecutive days, and anything past 25% is generally considered overloaded for sustained walking, even if it's manageable for a short stretch between a station and a hostel.
Base weight vs consumables
Total pack weight splits into two categories: base weight (everything except food, water, and fuel — clothing, shelter, sleep system, electronics, toiletries) and consumables (what you're carrying to eat and drink). Base weight is largely fixed trip to trip; consumables change constantly. Weighing them separately makes it obvious where to actually cut weight, since consumables are temporary but base weight follows you the whole trip.
Weighing what you actually own
You don't need special gear to start — a kitchen scale is enough. Weigh every item you're planning to pack before you leave, not after, and write the numbers down. Most people are surprised by which items are the heaviest; it's rarely the obvious ones like a laptop, and often something mundane like a stuffed toiletry bag or an extra pair of shoes.
Cutting weight without buying anything
The cheapest way to drop pack weight is subtraction, not shopping: pull out anything you packed "just in case" and haven't used in your last few trips, swap a full-size toiletry for a travel one, and count how many of a given clothing item you actually need versus how many you packed out of habit. Small cuts across many items add up faster than agonizing over one piece of expensive gear.
Checking where you land
Once you've got a base weight and a rough consumables weight, add them together and divide by your body weight to see your percentage. A backpack packing-weight calculator does this instantly and tells you which band you're in, so you can decide before you leave whether your pack needs a second pass.
What good actually feels like
A pack in the 10–15% range should let you walk for twenty or thirty minutes — station to hostel, say — without needing to stop and adjust straps or take a break. If you're wincing at your shoulders or lower back within the first five minutes of putting it on, that's a reasonably reliable sign you're over the comfortable range for your body weight, regardless of what the number on the scale technically says.
Revisit it mid-trip, not just before
Pack weight tends to creep upward over a long trip — a souvenir here, an extra layer bought for unexpected cold there — so it's worth re-weighing partway through a multi-month trip, not only before you leave home. Anything that's crept in and hasn't been used in the last few weeks is a reasonable candidate to mail home or leave behind at a hostel's swap shelf.
Packing light isn't just about comfort on the trail — a pack you can carry all day changes how cheaply you can travel, since you can walk instead of taking a taxi, or take the budget overnight bus without dreading the platform transfer.