Minimum Gas Calculator (CAT Method)
Select Depth:
10 ft
15 ft
20 ft
30 ft
40 ft
50 ft
60 ft
70 ft
80 ft
90 ft
100 ft
110 ft
120 ft
130 ft
RMV (cuft/min):
Include Buddy:
Yes
No
Ascent Rate (ft/min):
Time to Solve Problem (min):
Select Tank:
AL80 (77.4 cuft @ 3000 PSI)
HP100 (100 cuft @ 3442 PSI)
HP120 (120 cuft @ 3442 PSI)
Turn Pressure Method:
All Usable
Rule of Halves
Rule of Thirds
Depth (ft)
Min Gas (cuft)
Min Gas (PSI)
Usable Gas (cuft)
Usable Gas (PSI)
Turn Pressure (PSI)
Max Bottom Time (min)
10
15
20
30
40
50
60
70
80
90
100
110
120
130