How much food per day for backpacking?
Under-pack food and you spend the last day of a trip hungry and low on energy, right when you need it most. Over-pack and you’re carrying dead weight up every climb for a week. Neither is close to catastrophic, but both are avoidable with a bit of math up front.
Here’s how to figure out how much food to bring, without guessing.
The baseline: calories and weight
REI’s planning guidance puts backpacking food needs at roughly 2,500 to 4,500 calories per person per day, translating to about 1.5 to 2.5 pounds of food per day (REI). That’s a wide range on purpose. Where you land depends on your size, your metabolism, and how hard the trip actually is.
A relaxed 8-mile day at low elevation sits toward the lower end. A strenuous 15-mile day with 4,000 feet of climbing pushes you toward the top of the range, sometimes past it for bigger eaters.
A simple way to calculate your total
- Pick a daily calorie target. 2,800–3,200 calories/day is a reasonable default for a moderate trip; go higher for big mileage or cold weather, since staying warm burns calories too.
- Multiply by trip length. A 4-day trip at 3,000 calories/day is 12,000 calories total, per person.
- Convert to weight using calorie density. Efficient backpacking food runs 100–125+ calories per ounce (REI). At 110 cal/oz, 12,000 calories works out to roughly 109 ounces, or about 6.8 pounds of food for the whole trip.
- Add a small buffer. An extra 5–10% covers a harder-than-expected stretch or just wanting a second dinner; for the 4-day example above, that’s under a pound. If you want a true buffer against an unplanned extra day on trail, pack a full extra day’s food rather than relying on a small percentage bump.
The same math scales cleanly: double the trip length, roughly double the food weight, assuming your daily target stays constant.
Why calorie density matters more than portion size
Two meals with the same “serving size” can carry wildly different calorie counts. A dehydrated backpacking dinner with fats and oils built in can hit 600–800 calories in a 4-ounce pouch. A bag of fresh vegetables at the same weight might carry a fraction of that.
This is why experienced backpackers gravitate toward nut butters, oils, cheese, dried meats, and dehydrated meals over fresh produce or canned goods: it’s not about taste preference alone, it’s about getting more calories per pound carried. Every ounce you add to your food bag, you carry on every climb of the trip.
Adjusting for trip difficulty
Difficulty affects calorie burn more than raw mileage does. A flat 12-mile day and a 12-mile day with 4,000 feet of gain are very different calorie expenditures, even though the food-weight math above treats “trip length” as the main variable. If your itinerary has a genuinely brutal day in it, plan a bit more food for that stretch specifically, not just more overall.
Ridgefold’s difficulty calculator rates each day of a route as Easy, Moderate, Hard, or Strenuous using the same distance-plus-elevation model, a quick way to spot which day of your itinerary needs the calorie bump.
A few practical notes
Breakfast and dinner carry more calories than lunch, for most people. A hot dehydrated dinner is easy to load with fat and calories; lunch tends to be grazing (bars, nuts, jerky) spread across the day rather than one big sitting.
Resupply changes the math. If your trip includes a resupply stop, you only need to carry food for the segment before it, not the whole trip. Recalculate per segment rather than for the total distance.
Cold weather adds real calorie demand. Staying warm burns energy even at rest. Push toward the higher end of the range, or above it, for cold-weather or high-altitude trips.
Don’t forget your stove fuel. Food weight calculations often leave out fuel, but a multi-day trip’s fuel canister or bottle adds real ounces too. Plan it alongside food, not as an afterthought.
Frequently asked questions
How many calories do I need per day backpacking?
Most people need 2,500 to 4,500 calories per day while backpacking, depending on trip difficulty, body size, and conditions. A moderate trip usually lands around 2,800–3,200 calories/day per person.
How much does backpacking food weigh per day?
Roughly 1.5 to 2.5 pounds per person per day, depending on how calorie-dense your food is. Choosing food around 100+ calories per ounce keeps you toward the lighter end of that range for the same calorie total.
Should I pack the same amount of food for every day of a trip?
Not necessarily. If your itinerary has one especially hard day (a big climb, a long push), it can be worth front-loading slightly more calorie-dense food for that day specifically, rather than splitting everything evenly.
What’s the easiest way to cut food weight without cutting calories?
Favor fats and oils, which carry roughly double the calories per gram of carbs or protein. A spoonful of olive oil or a handful of nuts adds meaningful calories for very little added weight.
Once your food plan is set, the rest of the trip’s logistics fall into place around it. Ridgefold shows you the exact day-by-day miles and elevation for your route, so you know which days actually need the extra calories before you’re standing at the trailhead deciding what to pack.