Gas Calculator

Rule of thirds / quarters / sixths on main gas + halves rule (stages).

Current configuration: 2 divers, 4 cylinders total

Gas rule

Diver 1

BACK GAS — TWIN SET (×2 cylinders)

Single cylinder volume (L)

Starting pressure (bar)

Total: 24 L capacity · 4800 L of gas

BACK GAS — TWIN SET (×2 cylinders)

Single cylinder volume (L)

Starting pressure (bar)

Total: 24 L capacity · 4800 L of gas

Enter your SCR and depth to calculate maximum penetration time.

SCR (L/min surface)

Planned depth (m)

Team turn pressure (lowest limit)

89 bar

Limiting diver: Diver 0

Diver 12 cylinders

Back gas (twins)

Turn

133 bar

Usable

3,200 L

Reserve

1,600 L

Total gas

4,800 L

Team limit

133 bar

Diver 22 cylinders

Back gas (twins)

Turn

133 bar

Usable

3,200 L

Reserve

1,600 L

Total gas

4,800 L

Team limit

133 bar

The most limited diver controls the dive.

Gas planning must be verified by the instructor.

This tool is educational and does not replace training.