Tyler Peterson
About
Scuba Tools
Contact
Scuba Tools
Units
Imperial (ft / PSI)
Metric (m / bar)
SCR Calculator
Cylinder
AL80 (77cu ft / 3000psi)
HP100 (100cu ft / 3442psi)
LP85 (85cu ft / 2640psi)
LP95 (95cu ft / 2640psi)
LP104 (104cu ft / 2640psi)
HP120 (120cu ft / 3442psi)
Double AL80 (154cu ft / 3000psi)
Double HP100 (200cu ft / 3442psi)
Double LP85 (170cu ft / 2640psi)
Start Pressure
psi
End Pressure
psi
Avg Depth
ft
Time
min
Calculated SCR
--
cu ft/min
Pre-Dive Gas Planning
SCR
cu ft/min
Max Planned Depth
ft
Cylinder
AL80 (77cu ft / 3000psi)
HP100 (100cu ft / 3442psi)
LP85 (85cu ft / 2640psi)
LP95 (95cu ft / 2640psi)
LP104 (104cu ft / 2640psi)
HP120 (120cu ft / 3442psi)
Double AL80 (154cu ft / 3000psi)
Double HP100 (200cu ft / 3442psi)
Double LP85 (170cu ft / 2640psi)
Gas Strategy
All Usable
Half Usable
Rule of Thirds
Modified 1/3 (Conservative)
Start Pressure
psi
Min Gas
600
psi
33.2 cu ft
Usable Gas
(all)
2842
psi
170.5 cu ft
Turn Pressure
600
(600)
psi
Time (Max Depth)
70
min
Time (Avg Depth)
112
min
Show Calculations
Turn
Standard Gases
PPO₂:
1.2
1.3
1.4
1.5
1.6
Gas Name
Oxygen (O
2
)
Helium (He)
MOD (ft)
Air
21%
0%
187
Nitrox 32
32%
0%
111
TriMix 21/35
21%
35%
187
TriMix 18/45
18%
45%
223
TriMix 15/55
15%
55%
275
TriMix 12/65
12%
65%
352
TriMix 10/70
10%
70%
429