Base weight is the weight of everything in your pack except the consumables you use up: food, water, and fuel. It is the number backpackers use to compare setups, because unlike total pack weight it does not change with trip length. Here is what counts, what "good" looks like, and where the weight actually hides.
Three numbers get used, so it helps to keep them straight. Base weight is your pack and everything in it minus food, water, and fuel. Total (or "full skin-out") weight adds those consumables and sometimes what you wear. Because food and water swing several pounds between an overnighter and a week-long carry, base weight is the fair way to compare gear setups. When someone says their pack is "12 pounds," they almost always mean base weight.
| Category | Base weight |
|---|---|
| Traditional | over 20 lb |
| Lightweight | 10 to 20 lb |
| Ultralight (UL) | under 10 lb |
| Super-ultralight (SUL) | under 5 lb |
These are conventions, not rules. Ultralight is not a virtue in itself; a lower base weight means more comfort over miles and less strain, but only if you have not cut safety or the gear you actually need.
Most of your base weight lives in three items: your shelter, your sleep system (bag or quilt plus pad), and your pack. Together they usually make up more than half of base weight, which is why weight-cutting starts there rather than with a lighter spork. As a data point, the single lightest shelter, pad, and pack in our database weigh roughly 0.8 lb, 0.5 lb, and 0.6 lb respectively, so an optimized big three can drop under 2 lb, though real-world setups add warmth and durability back in.
Attack the big three first, because that is where the pounds are: a lighter shelter, a quilt instead of a heavy bag, and a pack sized to the lighter load. Then weigh everything else and drop or downsize the heaviest offenders. The cheapest "upgrade" is often leaving redundant gear home. Chase the big items; the small stuff rarely adds up to a shelter's worth of savings.
Everything in and on your pack except consumables, meaning food, water, and fuel are excluded (and usually the clothes you are wearing). Your pack, shelter, sleep system, cookware, and layers you carry all count.
By convention, under 20 lb is lightweight, under 10 lb is ultralight, and under 5 lb is super-ultralight. There is no "correct" number, though; the right base weight is the lightest one that still carries the gear you genuinely need for your conditions.
Your shelter, sleep system (bag or quilt plus sleeping pad), and backpack. They typically account for more than half your base weight, so they are where weight-cutting has the biggest payoff.
Base weight excludes consumables (food, water, fuel); total weight includes them. Base weight is used to compare gear setups because it does not change with trip length.
This guide explains published standards and industry specs, illustrated with figures drawn from the 500-plus products in our database. It is educational reference, not a substitute for matching gear to your own conditions. We take no sponsorships and run no paid placements.