Splint Length by Limb Calculator Estimate the splint cut length, padded length,

Contour Interval Elevation Calculator Estimate contour interval, total elevation change, target contour

Shear Leg Spread Calculator Estimate the geometry and forces in a two-leg

Latrine Size for Group Calculator Estimate the number of seats, enclosed stalls,

Wood Ash Volume Calculator Estimate cooled fire pit, stove, fireplace, or campsite

Human Waste Volume Calculator Estimate toilet waste volume, tank fill time, cassette