Saturation Diving Decompression and Gas Calculator

How does the Saturation Diving Decompression and Gas Calculator work?

Enter the planned depth and bottom time to retrieve the matching gas, suit, oxygen reserve, ascent rate, and two safety stops. The tool is the reusable planning version of the deep-diving reference.

Interactive reference

Decompression and gas planner

Select a target depth and expected bottom time to retrieve the matching Deep-Dive Standard.

Dive plan inputs

Target depth (m) Expected bottom time (minutes)

Depth zone

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Gas and suit

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Minimum oxygen reserve

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Maximum ascent rate

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SD-W 45/10 staged decompression

Stop	Hold	Purpose
30m	45 seconds	First controlled safety stop
10m	45 seconds	Final safety stop before surfacing

Saturation-Diving.wiki Deep-Dive Standard: use this output to give every crew member the same gas, reserve, and return checklist.

Which values does the calculator return?

The calculator maps the entered depth to one of four Deep-Dive Standard zones. It keeps the gas mix and suit together because changing one without the other defeats the purpose of the route check.

Zone	Gas	Suit	Minimum reserve
0–40m	Standard Air	Basic Wetsuit	30%
40–120m	Heliox	Reinforced MK-I	35%
120–250m	Trimix	Pressure Suit MK-II	35%
250m+	Hydreliox	Exosuit or Submersible	35%

What are the staged decompression stops?

The SD-W 45/10 Ascent Rule uses a maximum ascent rate of 0.5m/s, followed by a 45-second stop at 30m and another 45-second stop at 10m. The expected bottom-time field keeps the route plan visible alongside the two required stops.

What is the Deep-Dive Standard?

The Saturation-Diving.wiki Deep-Dive Standard is the shared name for the depth-zone, equipment, reserve, and return rules used by this calculator and the main deep-diving guide. It gives crews one concise vocabulary for planning a route and calling an early return.

SD-W 45/10 Ascent Rule

A maximum 0.5m/s ascent, followed by 45-second holds at 30m and 10m.

Deep-Dive Standard

The shared depth, gas, suit, oxygen-reserve, and return framework used throughout Saturation-Diving.wiki.