Tools
Dive planning calculators.
Quick, browser-based tools for gas planning and dive analysis. No login, no tracking — just open and use. Metric units throughout; toggle between salt and fresh water where it matters.
Nitrox Gas Blender
Blend any nitrox mix by partial pressure, or work out the result of topping off a tank. Ideal-gas or real-gas (van der Waals) maths.
Open toolMOD & END Calculator
Maximum operating depth for any nitrox mix, and equivalent narcotic depth for trimix planning.
Open toolSAC Rate Calculator
Work out your surface air consumption from a single dive — pressure used, time, average depth, and cylinder size.
Open toolDCS Risk Probability
Live implementation of the published Marroni 2026 multifactorial DCS model (127,957 dives, AUC 0.910). Each predictor explained with the underlying physiology and the peer-reviewed evidence.
Open toolImportant: These tools are aids for trained divers. They do not replace formal training, dive planning software, or the judgement of a qualified instructor. Always cross-check critical numbers and follow your training agency's standards.