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Scuba Cylinder Decanting Calculator

The Decanting Calculator helps divers quickly determine the final equalized pressure when transferring gas between cylinders. It is ideal for planning gas sharing or topping up tanks and ensures accurate, safe pressure estimates for efficient dive preparation.

Note that the calculator only models gas transfer from a single cylinder to another single cylinder. If you plan to decant from one cylinder into multiple (e.g., from a 15 L into a 24 L twinset with the isolation valve closed), you may achieve a slightly higher resulting pressure than shown, but the difference will not be significant.


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Important Warning: The calculators provided on this page are intended for reference purposes only. While we strive for accuracy, divers are strongly advised to verify the output of these calculators independently before use. Always double-check calculations and consider all safety factors relevant to your specific diving conditions and experience level. Diving without proper verification and planning can be dangerous. Dive safely and responsibly.