Dive Toolbox vs gasblender

DiveToolbox — Professional dive planning and gas calculation tools for recreational and technical divers. DECOMPRESSION DIVE PLANNER Plan single-level and multi-level dives using the Bühlmann ZH-L16C algorithm with configurable gradient factors. Get detailed ascent profiles, gas switch schedules, and comprehensive safety analysis including CNS, OTU, gas density, and END monitoring. GAS BLENDING CALCULATOR Step-by-step fill instructions for Nitrox and Trimix blending. Supports partial pressure and continuous flow methods with real-time MOD calculations. MOD / EAD / END CALCULATOR Instantly calculate Maximum Operating Depth, Equivalent Air Depth, and Equivalent Narcotic Depth for any gas mix. GRADIENT FACTORS EXPLORER Visualize how GF Low and GF High affect no-decompression limits and decompression schedules. SAC RATE CALCULATOR Calculate your Surface Air Consumption rate from dive data to improve gas planning accuracy. ROCK BOTTOM CALCULATOR Determine minimum gas reserves for safe ascent, including emergency scenarios with configurable safety margins. SUCCESSIVE DIVE PLANNER Plan repetitive dives accounting for residual nitrogen and helium tissue loading from previous dives. UNIT CONVERSIONS Convert between metric and imperial units for depth, pressure, volume, and temperature. KEY FEATURES • Multi-gas support with automatic deco gas switching • Save and organize dive plans in folders • Save tank presets for quick planning • Share plans via link or QR code • Export plans as PDF • Customizable diver profile (GF, SAC, PPO2, speeds) • Dark and light themes • Available in 7 languages: English, French, German, Spanish, Italian, Polish, Russian Terms of Use: https://divetoolbox.com/en/terms Privacy Policy: https://divetoolbox.com/en/privacy

GasBlender is the gas blending calculator for technical diving. It works out your Nitrox and Trimix fills step by step, with the precision blenders and tech divers expect. Whether you are mixing a simple Nitrox 32 or a hypoxic multi-cylinder Trimix, GasBlender gives you the fill sequence bar by bar, checks the mix for safety and estimates its cost. THREE BLENDING METHODS - Partial pressure: empty the cylinder, then add each gas. Guaranteed result. - Top-up: keep the gas already in the cylinder and adjust. No waste. - Optimized: use your buffer mixes (Nitrox 40, etc.) before pure O2 to cut costs. KEY FEATURES - Nitrox and Trimix calculations - Reverse mode: find the resulting mix from measured pressures - Multi-cylinder support - Manage your available gas sources - Reusable mix templates - Blending history with CSV export - Cost estimation - Cylinder identification by QR code - Metric and imperial units - Light and dark themes SAFETY FIRST GasBlender shows real-time warnings on the critical parameters: partial pressure of oxygen (PPO2), maximum operating depth (MOD) and equivalent narcotic depth (END), so you can confirm a mix stays within your limits before filling. PRIVACY AND OFFLINE Fully functional offline. No sign-up, no data sent without your consent. Optional sync with your own server is available. FREE AND OPEN SOURCE GasBlender is free software (AGPL-3.0 license). The code is open and auditable. DISCLAIMER GasBlender is a calculation aid. It does not replace blender training or analysis of the final mix with a calibrated analyzer. Always analyze your gas before diving.