Bear canister, hypothermia risk, dehydration, emergency shelter, and altitude calculators.
Calculate the bear canister size needed based on trip duration, number of people, and food density. Required in many wilderness areas.
Assess hypothermia risk based on temperature, wind, wetness, and activity level. Understand the danger zone before it becomes an emergency.
Estimate hourly fluid loss from sweat during hiking based on temperature, exertion, body weight, and elevation. Stay ahead of dehydration.
Calculate tarp dimensions, cordage, and stakes needed for emergency shelter based on group size and conditions. Be prepared for unplanned bivouacs.
Calculate your calorie intake vs. burn rate on a backpacking trip. Understand how much energy debt you accumulate per day and when performance drops.
Calculate fair weight distribution for shared group gear based on individual body weight and fitness. Stronger hikers carry more of the communal load.
Calculate a safe ascent schedule to prevent altitude sickness. Based on the wilderness medicine guideline of no more than 1,000-1,500 ft sleeping elevation gain per day above 10,000 ft.