Dive Toolbox
Onosia
DiveToolbox — Professional dive planning and gas calculation tools, built by divers, for divers.
Whether you're a recreational diver planning your next nitrox dive or a technical diver preparing a multi-gas decompression profile, DiveToolbox gives you the precision tools you need.
8 DIVING TOOLS
▸ Decompression Dive Planner — Bühlmann ZH-L16C algorithm with configurable gradient factors, multi-gas planning, automatic deco gas switching, CNS/OTU tracking, and emergency gas analysis.
▸ MOD / EAD / END Calculator — Maximum Operating Depth, Equivalent Air Depth, and Equivalent Narcotic Depth for nitrox and trimix. Includes Best Mix finder.
▸ Gas Blending Calculator — Nitrox and trimix blending with partial pressure method. Step-by-step fill instructions.
▸ Unit Conversions — Depth, pressure, temperature, volume, and weight between metric and imperial.
▸ Gradient Factors Calculator — No-decompression limits with configurable gradient factors. 6 conservatism presets.
▸ Successive Dives Planner — Plan dive sequences with surface intervals, residual nitrogen, and adjusted NDLs.
▸ SAC / RMV Calculator — Calculate your Surface Air Consumption rate from any dive.
▸ Rock Bottom Calculator — Minimum gas reserve for emergency ascent with buddy air sharing.
KEY FEATURES
• Bühlmann ZH-L16C decompression algorithm
• Multi-gas planning: Air, Nitrox, Trimix, Heliox
• Configurable gradient factors with 6 presets (30/70 to 50/85)
• Real-time calculations
• Save and share dive plans
• Metric and imperial units
• 7 languages (EN, FR, DE, IT, ES, PL, RU)
• Dark and light themes
FREE — No account required:
• Unit Conversions
• MOD / EAD / END Calculator
• Gradient Factors Calculator
PREMIUM — With subscription:
• Decompression Dive Planner
• Gas Blending Calculator
• SAC / RMV Calculator
• Rock Bottom Calculator
• Successive Dives Planner
• Unlimited saved dive plans
FOR DIVE PROFESSIONALS
Instructor plans include student access management. Dive center plans offer team management with bulk access codes.
Whether you're a recreational diver planning your next nitrox dive or a technical diver preparing a multi-gas decompression profile, DiveToolbox gives you the precision tools you need.
8 DIVING TOOLS
▸ Decompression Dive Planner — Bühlmann ZH-L16C algorithm with configurable gradient factors, multi-gas planning, automatic deco gas switching, CNS/OTU tracking, and emergency gas analysis.
▸ MOD / EAD / END Calculator — Maximum Operating Depth, Equivalent Air Depth, and Equivalent Narcotic Depth for nitrox and trimix. Includes Best Mix finder.
▸ Gas Blending Calculator — Nitrox and trimix blending with partial pressure method. Step-by-step fill instructions.
▸ Unit Conversions — Depth, pressure, temperature, volume, and weight between metric and imperial.
▸ Gradient Factors Calculator — No-decompression limits with configurable gradient factors. 6 conservatism presets.
▸ Successive Dives Planner — Plan dive sequences with surface intervals, residual nitrogen, and adjusted NDLs.
▸ SAC / RMV Calculator — Calculate your Surface Air Consumption rate from any dive.
▸ Rock Bottom Calculator — Minimum gas reserve for emergency ascent with buddy air sharing.
KEY FEATURES
• Bühlmann ZH-L16C decompression algorithm
• Multi-gas planning: Air, Nitrox, Trimix, Heliox
• Configurable gradient factors with 6 presets (30/70 to 50/85)
• Real-time calculations
• Save and share dive plans
• Metric and imperial units
• 7 languages (EN, FR, DE, IT, ES, PL, RU)
• Dark and light themes
FREE — No account required:
• Unit Conversions
• MOD / EAD / END Calculator
• Gradient Factors Calculator
PREMIUM — With subscription:
• Decompression Dive Planner
• Gas Blending Calculator
• SAC / RMV Calculator
• Rock Bottom Calculator
• Successive Dives Planner
• Unlimited saved dive plans
FOR DIVE PROFESSIONALS
Instructor plans include student access management. Dive center plans offer team management with bulk access codes.
Developer email
contact@divetoolbox.com
Developer website
https://divetoolbox.comReleased
Mar 4, 2026
Current version
4.3.0
Android version
7.0
Screenshots
