Calculate tinder requirements and fire starting time based on conditions.
Calculate heat loss from shelter and insulation needed.
Sun angle at your latitude for fire-by-friction planning.
Filter capacity, flow rate, and what contaminants can be filtered.
Water loss rate based on temperature and exertion level.
Water yield from rainfall based on collection area and duration.
Calories needed per day based on activity, temperature, body weight.
Calories burned during survival activities.
Emergency ration portions for extended survival situations.
Days of supplies based on pack weight and daily consumption.
Wind chill, temperature, and clothing insulation (CLO value).
Wind chill and exposure time to frostbite risk.
Time to rewarm frozen extremities using warm water immersion.
Compass bearing between two points on a map.
Determine compass direction from moon phase and orientation.
North direction from Polaris, Cassiopeia, and Southern Cross.
Determine cardinal directions from shadow stick method.
Distance on map vs actual terrain distance accounting for slope.
Magnetic declination and deviation for your location.
Rate terrain difficulty based on vegetation, slope, and water.
Adjust supply calculations for altitude effects.
Visibility range for signal smoke, mirrors, and flares.
How long will my signal fire or beacon last?
Rope needed for shelter, snares, and general use.
Trap loop size for target animal species.
Breaking strength of natural fibers vs paracord.
Calculate pack weight vs body weight ratio.
Interactive sharpness test with visual guide.
Food storage safety distance from camp.
Score wound and injury severity for treatment urgency.