r/techdiving

Hi r/diving

I built a free gas blending calculator for nitrox and trimix, and wanted to share it with you all.

• Visual fill recipe (He, O₂, top-up)
• Advanced mode with up to three arbitrary gases.
• List of common and custom mixes (click on start/end mix)
• Real-gas (Z-factor) accurate (ideal gas and Van der Waals for comparison).
• MOD & END for your ppO₂
• Metric or imperial
• Configuration stored locally.
• Free, no ads, no downloads, no installs — web + iOS/Android
• Also works as a tool in Claude/ChatGPT/Gemini (add url as connector/mcp server)

Available at https://arcusblender.org

Feedback welcome. Dive safe. Cheers!