Caving Calculators & Tools
Free, practical tools for planning a trip underground — size a rope for a pitch, check a headlamp's runtime, layer for the cave's temperature, reduce a passage survey, gauge air and ventilation, and build a gear checklist before you go.
Rope Length Calculator
Work out the rope you need for a pitch from its depth, rebelays and deviations, a rigging-knot allowance, and a safety margin — plus how much to carry for the whole trip.
Headlamp Runtime Calculator
Turn a battery's capacity and a light's draw at a chosen brightness into real burn-time hours, with an efficiency factor for cold and aging cells.
Cave Temperature Layering Guide
Get a clothing-layer recommendation from a cave's year-round temperature, trip length, activity level, and whether the route is wet — built to avoid both chill and sweat-soak.
Passage Survey Distance Calculator
Reduce compass, clinometer, and tape shots into horizontal distance and depth change per leg, and total them into a passage's overall length and depth.
Air & Ventilation Guide
Estimate airflow through a passage from its cross-section and air speed, and a rough CO₂ build-up for a group sitting in a poorly ventilated space over time.
Caving Gear Checklist Generator
Build a packing list scaled to trip type — horizontal, vertical (SRT), or wet — trip duration, and party size, from lighting and rigging down to spares.