Tools
Scuba Diving Calculators
Calculate Nitrox fills and MOD, END, breathing rate, gas requirements, repetitive-dive tissue loading, and unit conversions.
Nitrox MOD Calculator
Gas ManagementCalculate the depth where a Nitrox mix reaches a selected PPO2 threshold.
Nitrox Blending Calculator
Gas ManagementCalculate ideal oxygen and air additions for empty-cylinder and residual-gas Nitrox fills.
END and Trimix Calculator
Gas ManagementCalculate trimix partial pressures and Equivalent Narcotic Depth under an explicit narcotic-gas convention.
Real-Gas Cylinder Estimate
Gas ManagementEstimate gas removed from measured cylinder endpoint states and compare the conventional pressure-volume rule.
CNS & OTU Exposure Planner
Dive PlanningTrack retained CNS percentage and cumulative OTU across ordered dive segments and surface intervals.
Dive SAC Rate Calculator
Dive PlanningCalculate your Surface Air Consumption rate from dive data for better gas planning.
RMV Converter
Dive PlanningCalculate SAC rate from dive data and convert to RMV for tank-independent gas planning.
Rock Bottom Gas Calculator
Dive PlanningCalculate the minimum gas a team needs for a shared-gas ascent from depth and the matching reserve pressure for your cylinder.
Gas Consumption Planner
Dive PlanningModel gas use from breathing rate, depth, and time with a selected pressure allocation.
Dive Unit Converter
Dive PlanningQuickly convert pressure (psi/bar), distance (ft/m), and weight (lb/kg) without changing unit preferences.
Repetitive Dive Model
Dive PlanningExplore ZHL-16C nitrogen loading across a sequence of square-profile dives and air surface intervals.
Want the theory behind the numbers? Explore practical guides on Nitrox, SAC/RMV, PPO2 limits, and dive safety.
Read the diving guidesWant the next tool when it lands?
Get a short note when DiveCalc ships a useful new tool or a meaningful update.
Occasional updates. No spam. Unsubscribe anytime.