Nitrox calculator

104 reviews
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About this app

Nitrox calculator for any mixture of Enriched Air SCUBA breathing gas from 21% to 100%.

Uses both Metric and Imperial units, but calculates in Metric, so Imperial measures may appear off by a couple of feet at times.

Calculations show indications of maximum operating depth (MOD), conditional depth (CoD), equivalent air depth (EAD), single dive no-decompression limits (NDL), ppO2 levels, best mix for depth, Oxygen toxicity and allowed Oxygen time per day.

An optional page shows calculations for the Dräger Dolphin Semi-Closed Rebreather, including 'gas time' left in tank, fraction of inspired Oxygen from counter-lung, with the MOD, CoD, EAD and NDL dive parameters calculated based on the fraction of inspired O2. Be sure to check the settings for tank volumes and pressures before using the Dolphin mode, or your 'gas time' figures will be inaccurate.

I hope you find this app useful. This latest (and final) version of Nitrox Calculator is now Ad free - think of it as my gift to the diving community.

Please report any crashes with a message telling me what you were trying to do at the time - there seem to be more crashes in newer versions of Android. I will still try to fix them if I can, but some seem to be Android system crashes that I have no control over.

Happy and safe diving!
Updated on
Jan 25, 2016

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Ratings and reviews

99 reviews
Kevin Peterson
November 24, 2021
Works but is awkward and designed for an outdated Android version.
1 person found this review helpful
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A Google user
July 8, 2017
What does the percentage oxygen toxicity mean? Not come across this before.
2 people found this review helpful
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Docking Apps
October 6, 2017
Sorry for the late reply, I've been away from development for a while. Oxygen toxicity is more relevant to Rebreather usage - it's basically a measure of how much extra Oxygen you can use in a day, without any ill effects. It's pretty difficult to get anywhere near 100% Oxygen toxicity using only Nitrox (EAN) for diving. Happy Diving!
A Google user
June 6, 2016
This is the only app I have seen that has calculations for SCR Drager Dolphins.
7 people found this review helpful
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What's new

New for Version 2 - On-screen buttons to re-use calculated depth, NDL time and best mix figures, and automatically re-calculate other parameters. Also, all main Nitrox parameters are shown on one screen. Now AD FREE. But the app will no longer be regularly maintained.

Version 2.04 - Added fix for non-responding 'Back' button (I have no idea why this suddenly stopped working!) Added code to catch more boundary conditions.

Please report any problems - you never know I might just fix them! :-)

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