Gas Planning Worksheet
A fill-in sheet for rock bottom, usable gas, turn pressure, gas needed, bottom time and SAC rate, with a team table and a worked example.
Do the math before the dive.
Work it out by hand first. Then check it here. Every tool shows the math with your numbers in it, because the point isn’t the answer. It’s knowing the answer before your gauge tells you.
Tools
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Free tool
Gas Planner
Rock bottom, usable gas and turn pressure for the whole team, including mismatched cylinders. Print the plan.
Open the tool Free toolTank Factor Calculator
Convert psi to cubic feet and back for any cylinder, single or doubles, plus the factor for mental math.
Open the tool Free toolSAC Rate Calculator
Measure your surface consumption rate from a real dive, then see how fast your gauge moves at depth.
Open the tool Free toolNitrox and Trimix Calculator
PPO2, MOD, best mix, END, EAD, helium for a target END and your oxygen clock, for any mix.
Open the toolDownloads
Print them. Write on them. Bring them on the boat.
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Tank Factors and Gas Consumption
Tank factors for singles and doubles, psi per minute at every depth, and specs for 88 steel and aluminum cylinders.
Gas Consumption Table
How depth multiplies gas use, how long a cylinder lasts at each depth, and an AL80 gauge-over-time table in bar and psi.
Formulas for Gas Math
ATA, MOD, best mix, tank factor, END, EAD, partial pressure, SAC rate and the CNS clock, each with a worked example.
Dive Log
A printable log built for improvement: depth, time, pressure and SAC rate, weighting, team, and what you'll work on next.
Dive Emergency Action Plan
Fill in your site's oxygen, AED, phone numbers and nearest chamber before you dive, then work through an emergency step by step.
Tools don’t replace training
A calculator tells you what the numbers are. Training teaches you to run them in your head, at depth, with your team, while something else is going wrong. That’s where Essentials of Tech starts.