Base Weight Calculator for Backpacking

Base weight is the weight of everything in or on your pack minus food, water and fuel. It exists because consumables change every day, so stripping them out leaves one stable number you can compare against your own kit last season and against anyone else's gear list. Enter your eight categories below and this returns base weight, worn weight, consumables, loaded pack weight, total skin-out weight, and which of the four tiers you land in.

What counts toward base weight and what does not?

Three buckets, and the boundaries between them are the whole reason the number means anything.

• Base weight: shelter, sleep system, pack, kitchen, water gear, packed clothing, electronics and miscellaneous. The pack counts. The stuff sacks count. The stakes count.
• Worn weight: what is on your body at the trailhead, so shoes, socks, shirt, shorts, sun hat, watch and trekking poles in your hands.
• Consumables: food, water and stove fuel. Everything that gets lighter as you walk.

The uncomfortable part of that split is that worn weight is where dishonest gear lists hide. A heavy fleece is base weight if it is packed and worn weight if it is on you, and nothing stops somebody photographing themselves in four pounds of clothing and calling the result a 7 pound kit. Nobody is fooled except the person doing it, because the shoulder straps do not read the spreadsheet. Pick a convention, write it at the top of your list, and keep it for the season.

What is a good base weight?

Four tiers are used across the hobby, and they are defined only by base weight, not by comfort, price or how far you walk. The thresholds below are the ones this site uses everywhere.

Nothing improves by crossing a threshold. The jump from 22 lb to 17 lb changes how a long day feels far more than the jump from 10.4 lb to 9.9 lb does, and the second one costs several times as much. Full detail on where the tiers came from sits in the base weight tiers chart.

Why do three items decide most of the number?

Shelter, sleep system and pack are the Big Three, and in the default numbers above they are 107 of 158 ounces, or roughly 68 percent of base weight. That ratio holds for almost everyone. It is why the standard advice is to fix those three first and ignore the toothbrush, and it is why the calculator draws them in coral: if the coral bars are not most of your bar chart, something unusual is going on in your kit and it is worth finding out what.

The practical consequence is an ordering rule. Replacing a 5 lb tent with a 2 lb shelter takes 3 lb off in one purchase. Replacing eight small items to save the same 3 lb takes eight purchases, eight decisions and considerably more money. Work top down, which is exactly the argument laid out in the Big Three explained.

What does a real sub-10 pound list weigh, item by item?

Percentages are easy to argue with, so here is a complete three season kit built entirely from gear we have researched elsewhere on this site, with published manufacturer weights in both ounces and grams. Nothing exotic, nothing home made, and no weight that anybody measured on a kitchen scale to make a total look better.

That totals 143.9 oz, which is 8 lb 15.9 oz or 4,080 g, comfortably inside ultralight with an ounce of headroom for the small things everyone forgets. Note what it does not do: it does not drop the rain jacket, the down jacket, the satellite communicator or the water filter. Every one of those is carried. The weight came out of choosing well within each category, not out of leaving categories empty.

Note also where the money went. The X-Mid 2 Pro and the Revelation 20 are both cottage products sold direct only, which is normal at the light end of the market and means those two links earn us nothing. The Crown3 at 35 oz, 992 g is the single heaviest item on the list and also the cheapest of the three Big Three items, which is exactly the trade most people should make first.

What does the same trip look like at each tier?

The gap between tiers is not a gap in discipline, it is a gap in what the Big Three weigh. Here is the same three season overnight built four ways, with the Big Three broken out.

Two observations. First, the shelter column moves further than any other, from a Naturehike Cloud Up Base 2 at 68 oz, 1,928 g down to a tarp at 12 oz, 340 g, which is why the shelter is usually the first thing people replace. Second, the pack column shrinks last, because you cannot use a Hyperlite Southwest 55 at 32 oz, 907 g until the rest of the kit is light enough to justify it. Buying an ultralight pack for a traditional kit is the most common expensive mistake in this hobby, and it is covered in frameless versus framed packs.

Super ultralight also deserves the caveat nobody prints on it. Under 5 lb usually means a tarp rather than a shelter, a torso length pad, no spare clothing, and a very narrow weather window. It is a legitimate style for experienced hikers in known conditions, and it is a poor template for anyone still learning what they need.

Why is your real base weight heavier than your spreadsheet?

Published weights are marketing numbers. They are usually the minimum trail configuration for the smallest size, and they frequently exclude stakes, guylines, the stuff sack, the pump sack, or the second half of an accessory sold as a pair. Then there is the tail of small items nobody writes down: a lighter, a spare headlamp battery, a trowel, a repair kit, a permit, a pen, half a roll of leukotape wrapped around a pole. Eight to sixteen ounces of drift between a list and a scale is normal.

The fix costs about ten dollars. A digital pocket scale reading to 0.01 g, weigh everything once, write the real figure on the list, and never wonder again. It is the only piece of gear on this site whose whole job is to make the rest of your gear honest.

Three specific places the drift hides. Stakes and guylines are frequently excluded from a shelter's published trail weight, and six MSR Mini Groundhogs are 2.4 oz, 68 g on their own. Stuff sacks and pump sacks ship with pads and quilts and quietly add 1 to 3 oz, 28 to 85 g each. And accessory weights are often quoted per unit when you carry two, which is how a "1.8 oz" pair of socks becomes 3.6 oz in the pack.

How should you read the result?

Look at the bar chart before the total. Three patterns show up repeatedly and each one has a different fix.

• Coral bars dominate, total is high. This is the normal starting point and the good news, because it means the weight is concentrated in three items rather than scattered across forty. Replace in order of weight saved per dollar: shelter, then pack, then sleep system. The Big Three guide works through it.
• Coral bars are small, total is still high. Something unusual is inflating a minor category. Common culprits are a kitchen with a full cook set, an electronics category carrying two power banks, and a miscellaneous bar hiding a first aid kit nobody has opened in three years. This is the cheapest weight in the hobby, because removing it costs nothing.
• Consumables dwarf base weight. Very common and rarely noticed. If your consumables bar is bigger than your entire base weight, the leverage is in food density and water carry decisions, not in gear.

The tier label under the total is a description, not a grade. A 10.6 lb base weight that carries a Garmin inReach Mini 2 at 3.5 oz, 99 g and a proper rain shell is a better kit than a 9.8 lb base weight that carries neither. Sleeping bag and quilt temperature ratings are survival ratings rather than comfort ratings, so a kit that hits a number by dropping to a summer quilt has not got lighter, it has got narrower.

What does base weight deliberately leave out?

The two heaviest things most people carry. Food runs about 1.5 lb per person per day in three season conditions and closer to 2 lb per day in winter, and water weighs 2.2 lb per litre. A four day carry with two litres on your back is 6 lb of food plus 4.4 lb of water, which is 10.4 lb of consumables sitting on top of a base weight that may be smaller than either.

That is the honest perspective check on the whole exercise. Somebody with an 11 lb base weight who carries one litre between reliable sources is walking with less on their back than somebody with a 9 lb base weight who fills four litres out of habit. Run the numbers on both in the food weight calculator and the water carry calculator before you spend $400 chasing a pound.

How do you take weight off without taking safety off?

Cut duplicates first, then cut volume, then cut gear, then and only then buy gear. Most kits carry two knives, three light sources, a full first aid kit that includes items nobody knows how to use, and a change of clothing that never gets worn. That pass is free and it usually finds one to three pounds.

What does not get cut: rain gear, insulation, navigation, water treatment and an emergency communication plan. Going ultralight must not mean going unprepared, and every one of those five is a fixed cost of being outside rather than a place to save grams. Carry adequate shelter and insulation for the conditions you will actually meet, which are not always the conditions in the forecast. The full method, in order, is in how to cut base weight, and a worked example of a finished list sits in the sub-10 pound gear list.