Nitrox Scuba Diving Calculator Software

Download this free software below

Zip file size: 250 KB (software)
Printable: No

PDF file size: 613 KB (instructions)
Number of Pages: 3
Printable: Yes


The Recreational Nitrox Calculator is a tool for NITROX divers to calculate various diving related parameters when diving on air or nitrox and is designed to run on PCs running Windows operating systems. It accepts the following user inputs, which are restricted to the recreational limits shown:

  • The oxygen percentage (O2%) between 21% and 40%
  • Maximum O2 partial pressure (PO2) between 1.0 and 1.4 ata (1.6 ata contingency)
  • Maximum Operating Depth (MOD) to 40 meters / 130 ft

Nitrox Calculator Software screenshot

Nitrox Calculator Software

Given any two of the above parameters the third can be calculated and the tool is arranged into three separate calculators as follows:

  • Input O2% and PO2 to calculate MOD
  • Input MOD and PO2 to calculate O2%
  • Input MOD and O2% to calculate PO2

The tool will also give the following parameters for each calculator:

  • The Equivalent Air Depth (EAD)
  • The percentage of nitrogen in the mix (N2%)
  • Maximum nitrogen partial pressure (PN2) – (i.e. at the MOD)
  • Maximum ambient pressure (AP) – (i.e. at the MOD)


Download, unzip and save the tool to a suitable location on your computer. Go into the "Recreational Nitrox Calculator" folder and click on the setup.exe file. The program will be installed on your computer and will appear on your Start menu under All Programs. It may be removed by using the Windows "Add or Remove programs" utility found in the Control Panel.

Always seek consultation from a qualified Dive Instructor before using any information from this scuba manual.

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