Scuba Calculators & Dive Tools

Whether you're trying to pick an agency, diving air or Nitrox, planning cold water dives, or preparing for travel, these calculators can help you plan smarter and dive safer. Use our interactive tools to calculate MOD, estimate reserve gas, track your RMV, pack efficiently, and more. Built for recreational divers with real-world needs. No fluff, just reliable planning.

These calculators are designed to help you make safe, informed, and efficient dive plans. All tools use standard assumptions and are intended for educational use only and not as a substitute for formal training or real-world checks.

• Agency Recommender
• MOD Calculator
• Minimum Reserve Gas
• RMV / SAC Rate
• Buoyancy Estimator

Which Scuba Agency Is Right for Me?

There’s no one-size-fits-all scuba agency. Whether you're aiming to dive on vacation once a year or train toward technical or cave diving, the best certification path depends on your personal goals, values, and learning style. This 6-question quiz cuts through the marketing and gets straight to what matters. Your answers will help match you with the agency or agencies that align best with the kind of diver you plan to be in the next few years. We include five major training agencies in our results: PADI, SSI, SDI, NAUI, and GUE.

Calculating MOD, PO₂, EAD, and END When Diving Nitrox

Interactive Nitrox calculator that shows MOD, PO₂, EAD, and END based on your gas mix. Visual warnings highlight unsafe depths and oxygen exposure. Learn how Nitrox affects dive planning. We also have a deep dive on how to calculate MOD.

Minimum Reserve Gas Calculator

Plan the minimum gas required for you and your buddy to ascend safely from your planned depth.

RMV / SAC Rate Calculator

Calculate your gas consumption rate from dive log data to improve your planning accuracy.

Buoyancy Estimator

Use this tool to estimate your starting weight for a dive. We help you calculate a realistic freshwater and saltwater weight range based on your body, gear, and exposure suit choices. Always finalize your weighting with a proper in-water check.