Last Updated on 06/2026 by Mom Goes Camping
As a general rule, backpackers need 16 to 25 calories per pound of body weight when hiking. This breaks down to 2,500 to 3,500 calories of food per day for a healthy adult. However, depending on factors like temperature, pack weight, and hike difficulty, a backpacker might need fewer or more calories.
To get a more accurate calorie amount, the backpacking food calculator below provides an exact amount.
Also read: How much food to bring backpacking?
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How This Backpacking Calorie Calculator Works
This backpacking calorie calculator use the “Pandolf model.” It comes from a 1976 military study in which a researcher was tasked with figuring out how many calories soldiers burned when walking with their heavy packs on.
While the calculator is fairly good at giving you a ballpark amount of calories you’ll need, it can also be very inaccurate. The reason is because the calculator doesn’t factor in things like:
- What your actual basal metabolic rate is
- Muscle vs. fat you have on your body
- Hiking speed
- Terrain difficulty
- Whether you are male/female
- How long you are sleeping
- Outside temperature and weather
Any of these variables can completely change how many calories you need per day. (1, 2, 3, 4)
Also keep in mind that there are some issues with counting calories. As I talk about in this post about backpacking nutrition, calories do not always equal energy. For example, peanuts are very high-calorie but (as you can see in your poop), a lot of those calories are never absorbed by the body. Despite this, calorie counting is still the best way to figure out how much food you need to bring backpacking.
How Pack Weight Affects Calorie Needs
If you play around with the backpacking calorie calculator, you can see that your pack weight has a huge effect on how many calories you need while backpacking.
For example:
- A 150lb hiker going 3mph on a 1% slope will burn about 274 calories per hour without a pack.
- The same hiker with a 40lb pack would burn about 334 calories per hour.
That’s why going lightweight is so important when backpacking. Ironically, the more food weight you carry, the more food you will need to eat – thus making it even more important to choose calorie-dense foods and plan meals well.
Factors That Change Your Calorie Needs
The Pandolf formula gives you a solid baseline, but a few real-world variables can shift your needs significantly.
**Gender and body composition.** On average, women burn about 10–20% fewer calories than men of the same weight doing the same activity, because women typically carry a higher ratio of fat to muscle mass. If you’re a woman, start at the lower end of the 16–20 cal/lb range and adjust based on how you feel by day two and three.
**Altitude.** At elevations above 8,000 feet, your body works harder to breathe and maintain temperature. Calorie expenditure increases by roughly 10–15% at altitude. Heading into the mountains? Add a 10% buffer and carry it as extra snacks.
**Cold weather.** Your body burns extra calories just keeping warm. In temperatures below freezing, add another 200–400 calories per day beyond your baseline. This is not the place to go light on food.
**Uphill vs. flat terrain.** Steep grades dramatically increase expenditure beyond what the formula captures. On elevation-heavy days, bump your daily estimate up by 10–20% and snack as you climb rather than waiting for camp.
How to Use the Number in Real Planning**
Once you have your daily calorie target, use it to plan food weight. Most backpacking foods deliver around 100 calories per ounce. To hit 2,800 calories per day, you need roughly 28 oz (1.75 lbs) of food.
A useful daily breakdown:
* **Breakfast (20%):** \~560 cal — instant oatmeal, granola, coffee with cream powder
* **Lunch (15%):** \~420 cal — crackers, nut butter, jerky, dried fruit
* **Snacks (25%):** \~700 cal — trail mix, bars, chocolate, nuts
* **Dinner (25%):** \~700 cal — freeze-dried meal or DIY rice/beans/sauce
* **Buffer (15%):** \~420 cal — extra for hard days, cold nights, or delays
Backpacking Calorie Calculator FAQ**
**How many calories do I burn backpacking per day?**
Most backpackers burn between 2,500 and 4,500 calories per day depending on body weight, pack weight, terrain, elevation, and temperature. A 150-lb person carrying a 30-lb pack on moderate terrain typically burns around 2,800–3,200 calories. Use the calculator above with your actual weight and pack weight for the most accurate estimate.
**Does altitude affect how many calories I need while backpacking?**
Yes, noticeably. At elevations above 8,000 feet, your body works harder to breathe and maintain body temperature, increasing calorie expenditure by roughly 10–15%. Add a 10% buffer to your daily calorie target and pack it as extra snacks rather than planning larger meals you may not feel like eating.
**Should I eat more on uphill days versus flat terrain days?**
Absolutely. Climbing 2,000+ feet in a day dramatically increases calorie burn compared to flat miles. On big climb days, add an extra 300–500 calories and keep them accessible — snack as you hike rather than saving everything for camp. Energy crashes on a steep descent are genuinely unpleasant.
**How do calorie needs differ for women versus men?**
Women typically burn 10–20% fewer calories than men of the same weight doing the same activity, due to differences in muscle-to-fat ratio and metabolism. Start at the lower end of the calculator’s range. That said, individual metabolism varies — pay attention to how you feel by day two and three, and adjust your next trip accordingly.
**How do I calculate calories per ounce for my trail food?**
Divide the calories per serving by the serving weight in ounces. Aim for 100+ calories per ounce. Nuts and nut butter (\~165–180 cal/oz), dark chocolate (\~155 cal/oz), and olive oil (\~250 cal/oz) are the highest-density options. Commercial freeze-dried meals average around 100–120 cal/oz. See our full list of [calorie-dense backpacking foods](https://momgoescamping.com/calorie-dense-healthy-backpacking-foods/) for more options.
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Below are pictures of some of the lightweight, calorie-dense recipes included in the book.
