Pack Weight Ratio Calculator
Pack weight only means something relative to the body carrying it. Divide pack by body weight to find your load class, from ultralight to expedition-heavy.
Result
The classes are heuristics, not rules - fitness and terrain move the line. If the number is high, cut the big three: shelter, sleep system, pack.
How the calculation works
One division, five bands:
- Under 15%: ultralight. 15-20%: light. 20-25%: moderate. 25-30%: heavy. Above 30%: very heavy.
- The classic 20% rule (10% for day hikes) is the same model with one number - these bands split it finer, so a 27% load can be normal for one hiker and over target for another.
- Weigh the pack loaded and ready to walk - water included, which is why dry weight lists mislead.
- The bands assume all-day walking with the load on; short portages can go heavier.
The ratio tells you how heavy; the backpack balance calculator tells you whether the load sits right on your back - both matter for how a pack actually feels at kilometer 20.
Carrying a whole car-camping kit instead? The character-based loadout generator sizes the entire six-system kit to your body and scores the parking-lot-to-campsite shuttle burden for you - and your saved body weight prefills the calculator above.
Planning estimate only - not safety advice.
Frequently asked questions
How much backpacking weight is too much?
The widely quoted rule of thumb says a loaded backpacking pack should not exceed 20% of your body weight - 30 lb on a 150 lb hiker - and a day pack no more than 10%. Treat it as a ceiling, not a target: fit hikers carry 25-30% comfortably on multiday trips, and how the load sits on your back matters as much as the number. Enter your numbers above and the bands give a finer answer than the single rule.
What is a good pack-to-body weight ratio?
Common planning bands: under 15% of body weight is ultralight territory, 15-20% is a light and comfortable load, 20-25% is ordinary backpacking, 25-30% is heavy, and above 30% you are into expedition territory that needs fitness or a very good reason.
Why compare to body weight instead of using a fixed limit?
A 14 kg pack is trivial for a 95 kg, well-trained adult and punishing for a 50 kg teenager. Ratios track the actual strain on joints and metabolism far better than absolute numbers, which is why outfitters and militaries think in percentages.
My ratio is high - what do I cut first?
The big three: shelter, sleep system and pack itself, plus the consumables equation (a full water carry is heavy, so knowing refill points helps). Small items and ounce-counting come last; the kilogram-level decisions decide the ratio.
How does the trip context affect this?
If you set a pack load in your trip at the top of the page, the pack weight field starts from it - so the ratio you see reflects the load you are actually planning to carry.