Tools

SAC / air consumption calculator

Enter tank size, start and end pressure, dive time, and average depth to estimate surface air consumption (SAC / RMV). No account required.

Also try the wetsuit thickness picker.

Your dive

Tank internal volume (L)

Start pressure (bar)End pressure (bar)

Dive time (minutes)Average depth (m)

Results

14.3 L/min

Surface air consumption (SAC / RMV) at 18 m, ATA 2.80.

At this rate, a 12 L / 200 bar fill would last about 60 minutes at 18 m (illustration only).

Gas used: 1800 L (64 cu ft at surface)

Planning aid only — not medical advice. Work within your training, gas rules, and local procedures. Altitude, mix, cold, and workload change consumption.