Freeware SCUBA diving utility programs

Cylinder Buoyancy Calculator v 3.0


This application will calculate the amount of gas in a filled SCUBA cylinder, the buoyancy of the cylinder at the start of a dive, at the end of a dive, on the safety stop and when empty. This tool has been completely re-written for newer Windows operating systems.


Changes made to ver. 3.0:
- Imperial units option added.
- Manifold used option added.
- Total weight of gas used calculation added.
- Total amount of gas used calculation added.


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Requests for new features or improvements are welcome. Please e-mail me here: 

Nitrox Calculators


These Nitrox Calculators are PC utilities for calculating various parameters when diving on air or nitrox.

Recreational calculator v3.0.2: Download icon


Advanced calculator v3.0.2: Download icon


Requests for new features or improvements are welcome. Please e-mail me here: 


The advanced Nitrox Calculator is basically the same as the Recreational version but the MOD has been increased to 68 metres (223 feet) and the maximum 02% has been increased to 100%

Warning: You must be a qualified Nitrox diver to dive on Nitrox. The breathing of Nitrox underwater has its own inherent dangers and may lead to convulsions and drowning.