How Much Food to Bring Backpacking (By Trip Length, Effort & Calorie Density)

Pack too little food and you’re bonking by day two. Pack too much and you’re hauling dead weight for a week. The fix isn’t guesswork — it’s a simple calorie-per-day target paired with a calorie-density rule that keeps the weight in check. Here’s the actual math, plus what to put in your bag.

📚 Part of the Ultralight Backpacking Gear Guide. For specific meal picks, see our Backpacking Food Guide and Best Dehydrated Meals.

The Baseline Formula

Start here, then adjust:

2,700–3,200 calories per day covers most backpackers at moderate effort on a mild-weather trip. That’s a floor, not a max — big mileage, heavy elevation gain, or cold weather all push it higher.

Target 1.5–2.5 lbs of food per person per day. The spread depends entirely on calorie density (see below) — hit the high end of calorie density and you land near 1.5 lbs; pack lower-density food and you’ll need closer to 2.5+ lbs for the same calories.

The Calorie-Density Trick

This is the single biggest lever for keeping your food bag light: choose food that packs 120+ calories per ounce.

• High density (120–170 cal/oz): nuts, nut butter, olive oil, cheese, dehydrated meals, most bars, chocolate — these are what make ultralight food bags possible
• Medium density (80–120 cal/oz): pasta, rice, oatmeal, jerky, tortillas
• Low density (under 60 cal/oz): fresh fruit, canned food, most fresh vegetables — fine for a car camping cooler, a poor choice for a backpack

A food bag built almost entirely from high-density picks can hit 3,000 calories in well under 1.5 lbs. The same calories in low-density food can weigh 3+ lbs — over double, for identical fuel.

Adjustments by Trip Type

Thru-hikers on long trails routinely run a real caloric deficit even eating 4,000+ calories a day — that’s normal and part of why resupply towns matter as much for real meals as for restocking food bags.

A Sample Day (~3,000 Calories, ~1.5 lbs)

This is a starting template, not a rulebook — swap in whatever you actually like eating. See the full Backpacking Food Guide for more picks across every category.

Planning a Multi-Day Trip

The fastest way to plan food for a longer trip: build and weigh one full day, then multiply.

1. Lay out a full day of food using the table above as a starting point.
2. Weigh the whole day on a kitchen scale.
3. Multiply that weight by your number of trip days.
4. Repack identical daily bags (day 1, day 2, etc.) so you’re never digging through a giant food sack to find breakfast.

This beats planning every individual day from scratch, and it makes resupply math trivial — a 5-day stretch at 1.5 lb/day is a known, weighable 7.5 lb food carry.

Bear Canister Capacity

If you’re required to carry a bear canister, food volume — not just weight — becomes the real constraint. A BV500 holds roughly 6-7 days of food for one person at typical density; pack denser food if you’re pushing toward a week or more between resupplies. See our full bear canister guide for capacity comparisons across canisters.

Bottom Line

• Target 2,700–3,200+ calories/day, adjusted up for cold, elevation, or long trips.
• Chase calorie density (120+ cal/oz) — it’s the difference between a 1.5 lb and a 3 lb food bag for the same fuel.
• Weigh one full day, then multiply for fast, accurate multi-day planning.
• Fat is your friend — a bottle of olive oil is the cheapest, lightest calorie boost in your pack.

Related Guides

• 📚 Ultralight Backpacking Gear Guide — the complete guide
• Best Backpacking Food Guide
• Best Dehydrated Backpacking Meals
• How to Cold Soak: No-Cook Backpacking Meals
• Bear Canister Guide
• How Much Water to Carry Backpacking
• The Ultralight Backpacking Kitchen: The Complete Setup

Eat enough. Carry less. Never bonk.