DTDL Dive Calculator

⚙ DTDL Dive Calculator

Educational reference only — not for dive planning

Dive Parameters

Depth & Time

Depth

Bottom Time (min)

Units

Gas Mix

O2 %

He %

PO2 Planning Limits

TOD PO2 — Target Operating Depth Your planned dive depth limit (typically 1.2 bar)

MOD PO2 — Max Operating Depth Working limit (1.4 bar standard). Must be >= TOD PO2

Contingency PO2 Absolute ceiling (1.6 bar). Emergency reference only.

Warning: TOD PO2 exceeds MOD PO2. TOD should be less than or equal to MOD.

Tank & Consumption

Pressure Start

Pressure End

Tank Size (cu ft)

Working PSI

Algorithm Settings

GF Low

GF High

Gradient Factors apply to Buhlmann ZHL-16C only

Results

Algorithms to Compare

Buhlmann ZHL-16C

with Gradient Factors

Moderate

DSAT / PADI RDP

Recreational no-stop

Liberal

RGBM (Suunto)

Bubble model

Conservative

VPM-B

Variable Permeability

Conservative

DCIEM

Canadian military

Conservative

Algorithm NDL Comparison

Algorithm	Philosophy	NDL at Depth	Conservatism	Notes

Important: This calculator is an educational reference tool only. NDL values are simplified approximations and are not certified for actual dive planning. Always use a certified dive computer. Decompression sickness can occur even within calculated limits.