How to Choose a Rucksack Size for UK Hiking and DofE Expeditions
Rucksack size trips up more first-time hikers than any other piece of kit. Get it wrong and you're either lugging around a half-empty barn all day or watching your sleeping bag poke out of the top pocket because nothing else fits.
The short answer: for a single day on the UK hills, 20 to 30 litres is plenty. For a weekend with one overnight stop, look at 30 to 45 litres. For multi-day trips where you're carrying a tent, stove and food for several nights, aim for 45 to 65 litres. For a DofE expedition, the Duke of Edinburgh's Award itself recommends at least 60 litres, more for Silver and Gold, because of the extra kit and food you need between checkpoints.
Below we break down each trip type, what DofE actually says, how to check a rucksack fits properly, and which HikeWare packs cover each size bracket.
In this article
- How much rucksack capacity do I need for a day hike?
- What size rucksack for a weekend or overnight trip?
- What size rucksack does DofE recommend for expeditions?
- How do I know if a rucksack fits properly?
- Do I need an internal frame for heavier loads?
- FAQ
How much rucksack capacity do I need for a day hike?
For a straightforward day walk, you don't need much. As one UK sizing guide from Take a Hike UK puts it, a 20 to 25 litre pack is the classic UK day hike setup in mixed weather, with 15 to 20 litres enough on a shorter summer day. That's room for a waterproof, spare layer, food, water and the usual safety kit (map, torch, first aid) without carrying dead space you'll never fill.
MOLLE webbing, padded shoulder straps and chest/waist buckles for stability, plus water bottle pouches on each side. Just 1.01kg empty.
What size rucksack for a weekend or overnight trip?
Once you're carrying a sleeping bag, mat and cooking kit for one night away, 20 litres stops being realistic. The same UK guide suggests 30 to 45 litres for overnighters and winter day outings, with 30 to 40 litres for spring and autumn overnight trips and up to 45 litres if you're carrying extra layers for a UK winter day out. This is the bracket where a compression strap system earns its keep, since a half-full weekend pack shifts around and throws your balance off on rougher ground.
What size rucksack does DofE recommend for expeditions?
If you're kitting out for a Duke of Edinburgh's Award expedition, don't guess. DofE's own expedition kit guidance recommends at least 60 litres, and says you may want more capacity for Silver and Gold Awards, where you're self-sufficient for longer and carrying more food between checkpoints. Bronze expeditions typically sit at the lower end of that range, while Silver and Gold groups often go for 65 to 70 litres so there's room for shared group kit like a stove or tarp.
70 litre capacity at just 1kg, with a breathable mesh-padded back panel and multi-position torso adjustment for a snug fit on younger hikers.
For the rest of your kit list, our DofE Expedition Kit collection covers everything else you'll need, from sleeping bags to head torches.
How do I know if a rucksack fits properly?
Capacity is only half the job. A rucksack that's the right number of litres but poorly fitted will still hurt on a long carry. DofE's own guidance is blunt about it: the pack should transfer the weight of your kit to your hips, not your shoulders. That means a padded waist belt that actually tightens down, an adjustable back length, and shoulder straps that sit close without digging in. If most of the load is hanging off your shoulders after five minutes of walking, the pack isn't adjusted correctly, whatever size it is.
| Trip type | Recommended size | What you're carrying |
|---|---|---|
| Day hike | 15 to 30L | Waterproof, spare layer, food, water, map, torch |
| Weekend/overnight | 30 to 45L | Above, plus sleeping bag, mat, cook kit for one night |
| Multi-day (3 to 5 nights) | 45 to 65L | Full camping kit and food for several days |
| DofE expedition (Bronze/Silver/Gold) | 60 to 70L+ | Personal kit, share of group gear, food between checkpoints |
Do I need an internal frame for heavier loads?
Once a 70 litre pack is loaded properly for a multi-day trip or a Gold DofE expedition, it can easily carry 12 to 15kg. At that point, an internal frame makes a real difference. It holds the pack's shape so the weight sits against your back and hips instead of sagging, and it stops the load pulling you backwards on steep sections.
70 litres with internal frame support, widened foam-padded straps, and a rain cover and waterproof liner bag included. 2kg empty.
Frequently asked questions
What size rucksack do I need for a DofE expedition?
At least 60 litres, according to DofE's own kit guidance, with Silver and Gold groups often choosing 65 to 70 litres for the extra food and shared group kit.
Can I use a 30 litre rucksack for an overnight camp?
It's a tight fit once you add a sleeping bag, mat and cook kit. A 30 litre pack is best kept for day hikes; step up to at least 40 to 45 litres as soon as you're camping overnight.
What's the difference between the 70L Night Cat and the internal frame version?
Both hold 70 litres, but the internal frame version adds structure that keeps the load stable when it's fully packed, at the cost of an extra 1kg of pack weight. It also comes with a rain cover and waterproof liner bag included.
Should the weight sit on my hips or my shoulders?
Your hips. DofE's fitting guidance is explicit that a properly adjusted rucksack transfers the weight of your kit onto your hips rather than your shoulders, which is what keeps a long carry comfortable.
Is a bigger rucksack always better?
No. An oversized pack is heavier even when empty and makes it easy to overpack, which just means more weight on your back. Match the size to the trip, not the other way round.
Find the right rucksack for your next trip
From day-hike daysacks to DofE-ready 70 litre packs, HikeWare has a size for every trip.
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