PhorcysMOD

MOD Calculator provides divers with a fast, accurate way to calculate the Maximum Operating Depth (MOD) for any nitrox mix. Built for both recreational and technical divers, the app delivers instant results using your selected oxygen percentage, PO₂ setting, and choice of fresh or salt water.

Designed with a clean, intuitive interface, MOD Calculator makes pre-dive planning quick and reliable—right from your iPhone.

Features

Instant MOD calculations in both feet and meters

Adjustable O₂ percentage slider for precise nitrox mixes

Selectable PO₂ setpoint options from 1.2 to 1.6 (and more)

Fresh vs. Salt water depth adjustment

Large, readable display for quick reference on the boat or during training

Accurate formula-based results matching standard dive planning tables

Whether you're checking a standard 32% mix or fine-tuning a custom blend, MOD Calculator gives you the exact depth limits you need for a safe dive. Show More