Hiking Calorie Calculator — Distance, Pack & Elevation
Calculate calories burned hiking from distance, elevation gain, pack weight, and your body weight.
Reviewed by Sher, Sports Science & Nutrition Specialist
Formula
Calories = MET x Weight(kg) x Duration(hr) x Terrain x Pack Multiplier
MET (Metabolic Equivalent of Task) is adjusted for elevation grade by adding 0.5 per percent grade to the base MET of 6.0. The terrain multiplier adjusts for surface difficulty (0.9 for paved to 1.5 for snow). The pack multiplier accounts for additional weight carried: 1 + (pack weight / body weight x 0.7). Duration is estimated from distance and grade-adjusted hiking speed.
Worked Examples
Example 1: Moderate Day Hike
Problem:A 170 lb hiker carries a 20 lb pack on an 8-mile trail hike with 2,000 feet of elevation gain. How many calories will they burn?
Solution:Total weight = 170 + 20 = 190 lbs (86.2 kg)\nGrade % = (2,000 / (8 x 5,280)) x 100 = 4.7%\nBase MET = 6.0, Adjusted MET = 6.0 + (4.7 x 0.5) = 8.35\nAvg speed = 3.0 - (4.7 x 0.15) = 2.3 mph\nDuration = 8 / 2.3 = 3.5 hours\nPack multiplier = 1 + (20/170 x 0.7) = 1.082\nCalories/hr = 8.35 x 86.2 x 1.05 x 1.0 = 755\nTotal = 755 x 3.5 x 1.082 = 2,858 calories
Result:Total: ~2,858 cal | 357 cal/mile | 817 cal/hr | Duration: 3h 29m
Example 2: Strenuous Mountain Hike
Problem:A 150 lb hiker with a 35 lb pack hikes 5 miles on rocky terrain with 3,500 feet of elevation gain. Calculate calorie burn.
Solution:Total weight = 150 + 35 = 185 lbs (83.9 kg)\nGrade % = (3,500 / (5 x 5,280)) x 100 = 13.3%\nAdjusted MET = 6.0 + (13.3 x 0.5) = 12.65\nTerrain multiplier (rocky) = 1.15\nAvg speed = 3.0 - (13.3 x 0.15) = 1.0 mph (min 1.5)\nDuration = 5 / 1.5 = 3.3 hours\nPack multiplier = 1 + (35/150 x 0.7) = 1.163\nCalories/hr = 12.65 x 83.9 x 1.05 x 1.15 = 1,282\nTotal = 1,282 x 3.3 x 1.163 = 4,923 calories
Result:Total: ~4,923 cal | 985 cal/mile | 1,492 cal/hr | Duration: 3h 20m
Frequently Asked Questions
How does elevation gain affect calories burned while hiking?
Elevation gain is one of the most significant factors in hiking calorie expenditure. Walking uphill requires substantially more energy than walking on flat ground because you are literally lifting your entire body weight plus pack weight against gravity with each step. Research shows that hiking uphill at a moderate grade of 10 percent increases energy expenditure by approximately 50 to 70 percent compared to flat terrain. At steeper grades of 20 percent or more, energy expenditure can double or triple. A hike with 2,000 feet of elevation gain over 4 miles burns roughly 40 to 60 percent more calories than a flat 4-mile hike. This makes elevation gain the single most important terrain factor in calorie calculations.
How does pack weight influence the number of calories burned hiking?
Carrying a pack increases calorie expenditure roughly proportional to the percentage of body weight the pack represents. Research from the U.S. Army Research Institute found that each additional pound of pack weight increases energy expenditure by approximately 0.7 percent of the unloaded energy cost. For a 170-pound hiker, a 20-pound pack increases total energy expenditure by about 8 to 10 percent, while a 40-pound pack increases it by 16 to 20 percent. Ultralight hikers carrying 10 to 15 pounds burn considerably fewer calories than traditional backpackers with 30 to 50 pound packs. This metabolic cost of load carrying is why pack weight optimization is such a significant topic in the hiking community.
What terrain factors affect calorie burn during a hike?
Different terrain types significantly impact the energy required for hiking. Paved roads and smooth paths are the most energy-efficient surface, requiring about 10 percent less effort than a typical dirt trail. Rocky, uneven terrain increases energy expenditure by 15 to 25 percent because of the additional stabilization and careful foot placement required. Off-trail bushwhacking through dense vegetation can increase expenditure by 30 to 50 percent due to obstacle navigation and route finding. Snow and sand are the most demanding surfaces, increasing energy expenditure by 50 to 100 percent because of the lack of solid footing and the additional effort needed to extract your feet with each step. Wet or muddy conditions fall between rocky and off-trail in their energy demands.
How much water should I bring on a hike based on calorie expenditure?
Water needs on a hike are directly correlated with calorie expenditure, as higher effort means more sweating and greater fluid loss. A general guideline is to drink approximately 0.5 to 1 liter of water per hour of hiking, with higher amounts needed in hot weather, at high altitude, or during strenuous uphills. For every 100 calories burned, you should consume approximately 4 to 5 ounces of water. On a hike burning 2,000 calories, plan for 80 to 100 ounces of water minimum. Electrolyte replacement becomes important on hikes lasting more than 2 hours, especially in warm conditions. Signs of dehydration include dark urine, headache, dizziness, and fatigue. Always carry at least 20 percent more water than your estimated minimum need.
References
Reviewed by Sher, Sports Science & Nutrition Specialist · Editorial policy