Plan safer dives with SAC calculations, gas planning tools, and upcoming MOD and dive planning features.
NordTek Dive Planner is a free scuba diving toolkit designed to help divers calculate gas consumption, estimate gas requirements and plan dives more effectively.
Use a SAC Test Dive:
Because the depth remains constant, that depth can be used as your average depth, producing a more accurate gas consumption rate.
Gas Required = SAC × ATA × Time
Gas consumption increases with depth because ambient pressure increases. ATA accounts for this effect when calculating gas requirements.
PPO₂ means partial pressure of oxygen. A higher PPO₂ increases oxygen exposure and oxygen toxicity risk.
Many training agencies use a PPO₂ of 1.4 as a working limit because it provides a balance between operational depth and oxygen exposure risk while still allowing practical dive planning.
NordTek uses 1.4 as the standard working limit because it is commonly used by many recreational and technical diving agencies for the active part of a dive.
Some divers use 1.2 or 1.3 for a more conservative plan, especially for deeper dives, cold water, stress, workload or longer exposure.
A PPO₂ of 1.6 is often treated as a contingency or decompression limit, not a normal working limit.
Always follow your training, agency standards, gas analysis procedures and dive computer settings.
SAC and RMV are often used interchangeably. NordTek calculates surface-equivalent gas consumption in L/min, which is technically RMV-style, but “SAC Calculator” is the familiar recreational diving term.
NordTek Dive Planner is a free scuba diving planning tool designed to help divers estimate gas requirements, reserve volumes, and dive logistics. Whether you're planning a recreational dive or preparing for more advanced dives, the planner provides quick calculations to support safer dive planning.
Features include gas consumption estimates, SAC/RMV-based planning, cylinder pressure calculations, and reserve gas planning. Always verify dive plans using proper training, dive computers, and established safety procedures.