Repetitive Dive & Surface Interval Calculator
Plan two consecutive dives and calculate the Residual Nitrogen Time (RNT), your pressure group, and the group you drop to after a surface interval. Uses standard recreational dive table pressure groups (A-Z) to keep your repetitive dives within no-decompression limits.
Planning multiple dives? Track them all with Depthlog
This tool plans two dives. Depthlog tracks every dive you actually make, including surface intervals and nitrogen loading, so you never lose the picture. Free account, no credit card required.
Dive 1 group
Group B
Pressure group after dive 1 (EAD 24.4 m)
After surface interval
Group B
Group after 60 min at the surface
Residual Nitrogen Time
17 min
RNT added to your dive 2 bottom time
Dive 2 group
Group F
Pressure group after dive 2 (EAD 14.1 m)
Cumulative CNS oxygen exposure
0.1%
Within NOAA limits.
This tool is intended to be used as an informational and educational tool
Always check the safety regulations and follow the standards relating to repetitive diving. Consult a certified diving instructor for proper training.
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